Sig rattler 300blk upper

Aug 18, 2023 ... ... SIG MCX® Rattler. Featuring a 5.5″ PDW barrel, the MCX platform has never been more compact or accessible. Ready to go wherever it's needed ...

Sig rattler 300blk upper. Upper Receiver for the Sig Sauer MCX Rattler. Features a 5.5 barrel chambered in .300 Blackout, and a handguard with MLOK attachment points for the installation of lights and lasers. When the US Special Operations Command put out a request for a Personal Defense Weapon (PDW) to replace the MP5, Sig Sauer responded with the MCX Rattler ; an ...

Convert your MCX to a 9" .300BLK SIG SAUER MCX Virtus. ... Upper assemblies and caliber exchange kits with barrel lengths less than 16 “may only be affixed to lower receivers that (1) ... MCX Rattler 5.5" Caliber exchange kit - 5.56NATO; MCX-SPEAR LT 9" UPPER AR CONVERSION KIT 300BLK-BLACK;

Available in 300 blackout, 5.56 NATO as well as 7.62X39 calibers. Experience the compact powerhouse, the SIG Sauer MCX Rattler LT, offering …Currently have a couple MCXs. A virtus in 6.75 and a 9 spear LT. The rattler upper receiver has a slightly shorter rail than the virtus/spear and I wanted all the parts to be comparable. 6.75 is - but quieter but with more gas to the face. Accuracy is similar at home defense ranges. The 9 will have better velocity and a bit further reach.Bad weather and disease, not demand, are behind the rally. Orange juice futures officially entered a bull market yesterday after a three-day rally sent the price for May delivery s... Shop for official factory direct SIG SAUER Upper receivers and fully assembled uppers. ... MCX-RATTLER LT UPPER ASSEMBLY - 6.75" 300BLK Price $1,799.99. Add to Cart. Will definitely pick this up as my choice for 300blk. I was mulling over the Sig Rattler, but the extra 2" of barrel is not a deal breaker for me, and I would prefer the ability to swap …

The Central Florida Tourism Oversight District board’s control is limited to basic infrastructure Florida’s plan to exert more control over Disney by stripping it of its special ta...Upper airway biopsy is surgery to remove a small piece of tissue from the nose, mouth, and throat area. The tissue will be examined under the microscope by a pathologist. Upper air...The Rattler is a SIG MCX in a discrete platform. The Rattler features a 5.5" barrel with PDW upper, 3 position pistol brace, and free floating M-LOK handguard. The Rattler is ready to go where-ever it's needed as the collapsible pistol brace makes for easy concealment and stowage. Chambered in 300 Blackout, for one of the shortest suppressed ...Description. The SIG MCX in a discrete platform ― featuring a thin, durable folding stock and a 5.5" barrel with PDW upper. Rapid deployment, thin, agile, and precise. This is the MCX Rattler. Featuring a 5.5" PDW barrel, the MCX platform has never been more compact or accessible. Ready to go where-ever it's needed, the MCX Rattler has a thin ... Midwest Gun Works The MCX-SPEAR-LT features a lightened handguard, offering enhanced maneuverability without sacrificing durability. Its sleek and ergonomic design ensures a comfortable grip and optimal control, allowing for effortless handling in various shooting conditions. Whether you're on the range or engaged in tactical operations, this rifle is designed ...Sig Sauer MCX Rattler Pistol - For Sale - MPN: PMCX-300B-5B-TAP-NB - UPC: 798681673179 - Price: $2,499.99 - MSRP: $2,749.99 - Notify Me ... Radian Complete Upper 300 Blackout 9 Inch ... $1,829.95. Remington UMC 300 Blackout 220 Grain 20 Rounds. $26.93. Ballistic Advantage Modern 300 BLK Barrel ...

SIG SAUER MCX RATTLER UPPER ASSEMBLY 5.5" - 300BLK. Convert any MIL-SPEC AR Lower into a MCX Rattler. Complete with upper assembly, lower receiver stock adapter kit, side folding AR buffer tube knuckler, and match duo trigger kit. Convert any MIL-SPEC AR Lower into a MCX Rattler. Complete with upper assembly, lower receiver stock adapter kit ...Feb 26, 2024 ... Today on TFBTV, James Reeves discusses a landmark evolution in personal defense weapons: the SIG MCX Rattler LT. This episode isn't just ...Midwest Gun WorksFree-floating M-LOK handguards matched with a PDW upper and 5.5" barrel, the MCX Rattler PSB is the ideal choice for fast-moving operators. Romeo4T Red Dot Features: Runtime in excess of 100,000 hours with solar and battery usage. Users can select from 4 different integrated reticle options (Dot, Circle-Dot, Dot with Holds, Circle-Dot with Holds)When insiders purchase shares, it indicates their confidence in the company's prospects or that they view the stock as a bargain. Either way, ... When insiders purchase shares,...Introducing the Sig Sauer MCX Rattler SBR 300 Blackout, a semi-automatic short-barreled rifle designed for rapid deployment, maximum agility, and unparalleled accuracy. This compact firearm is perfect for operators on the move, featuring a foldable stock and a 5.5-inch PDW barrel for easy concealment and stowage.

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The MCX Rattler features a dual position gas valve for suppressed and unsuppressed usage. The SIG Sauer MCX Rattler Conversion Kit includes the SIG Sauer MCX Rattler upper receiver with 5.5″ .300 BLK barrel, bolt carrier group, buffer tube eliminator/stock adapter, side folding adapter SIG Sauer Match 2 stage trigger, and QD adapter. This is the MCX Rattler. Featuring a 5.5" PDW barrel, the MCX platform has never been more compact or accessible. Ready to go where-ever it's needed, the MCX Rattler has a thin, foldable stock for easy concealment and stowage. This gun was designed from the ground up to be as discrete as possible while retaining all the capabilities of the MCX. This gun was designed from the ground up to be as discrete as possible while retaining all the capabilities of the MCX. Free-floating M-LOK handguards matched with a PDW upper and a PDW Ultra Thin Folding Aluminum Stock, the MCX Rattler SBR is the ideal choice for fast-moving operators. Technical Specifications: Caliber: 300BLK; Barrel Length: 5.5" This is the MCX Rattler. Featuring a 5.5" PDW barrel, the MCX platform has never been more compact or accessible. Ready to go where-ever it's needed, the MCX Rattler has a thin, foldable stock for easy concealment and stowage. This gun was designed from the ground up to be as discrete as possible while retaining all the capabilities of the MCX.

Free-floating M-LOK handguards matched with a PDW upper and 5.5" barrel, the MCX Rattler PSB is the ideal choice for fast-moving operators. Romeo4T Red Dot Features: Runtime in excess of 100,000 hours with solar and battery usage. Users can select from 4 different integrated reticle options (Dot, Circle-Dot, Dot with Holds, Circle-Dot with Holds) Midwest Gun WorksSig Sauer MCX Rattler Upper Assembly - 5.5" 300blk. Sig Sauer. MSRP: $1,799.00 $1,699.99 Sig Sauer SIG MCX Rattler Upper 300 Blackout Includes 5.5" Barrel M-Lok ...Jul 5, 2023 ... DONATE DIRECTLY TO THE STREAM AND HAVE TTS FOR $3 - https://streamlabs.com/2wild4tv/tip TTS for Superchat is $5 !The airline will show what the new Upper Class seat will look like on its soon-to-be-delivered Airbus A350s. On the heels of British Airways' unveiling of its new Club Suite busine...For op here is a list of the changes from the Rattler to the Rattler-LT: Completely new Barrel profile at 6.75" (an increase of 1.25") but still a "Heavy" profile. Slightly improved Gas Block and reprofiled piston. Improved, longer Upper Receiver with reinforced crossbolt area, small improvements to the barrel clamp. Sig Sauer MCX Rattler .300 BLK 5.5" M-LOK Upper Receiver - $1555.99 Upper Receiver for the Sig Sauer MCX Rattler. Features a 5.5 barrel chambered in .300 Blackout, and a handguard with MLOK attachment points for the installation of lights and lasers. Upper Receiver for the Sig Sauer MCX Rattler. The airline will show what the new Upper Class seat will look like on its soon-to-be-delivered Airbus A350s. On the heels of British Airways' unveiling of its new Club Suite busine...The SIG Sauer MCX Rattler Upper is available in 5.56 NATO and .300 BLK Calibers. Shooters can convert any Mil-SPEC AR Lower into a MCX Rattler with this upper assembly. Included is the upper assembly, lower receiver stock adapter kit, side folding AR buffer tube knuckler and match duo trigger kit. Xtreme Guns and Ammo stocks a full line …

Additional features of the MCX Rattler Canebrake include a 2-stage flat-blade match trigger, Cerakote E190 finished upper and lower, a folding coyote-tan PCB, and comes with one 30-round polymer 300blk Magpul™ magazine. MCX Rattler Canebrake. Total length: 29.5” Barrel length: 5.5” Barrel Twist: 1:5” Weight: 6lbs

Midwest Gun Works Sig Sauer MCX Rattler Upper Assembly - 5.5" 300blk. Sig Sauer. MSRP: $1,799.00 $1,699.99. Sig Sauer SIG MCX Rattler Upper 300 Blackout Includes 5.5" Barrel M-Lok Handguard Side Folding AR Buffer Tube Knuckler Includes Charging Handle Bolt Carrier Sig Duo Matchlite... Out of stock . Quick view. Sig Sauer - MCX-SPEAR LT 11.5 AR …The kit includes the complete upper with 5.5″ .300 Blackout barrel, bolt carrier group, buffer tube eliminator / 1913 back (for mounting a brace or stock), 1913 side folding adapter (for mounting a buffer tube for brace or stock), Sig’s Match Duo 2 stage trigger, and a 1913 QD adapter. The Rattler has a two position gas valve for running ...MCX Upper 300 Blk Assembly # - MCX Upper 300 Blk Assembly. Cart and Account. Join E-Mail List; ... Sig Sauer MCX Upper 300 Blk Assembly. Ships with: Upper, Bolt Carrier Group, Charging Handle, Taper Cap. This is ONLY the upper assembly. ... UPPER, SIGMCX, 300 BLK, 5.5 IN, RATTLER, BLK, SEMI, AL MLOK HG. Out Of Stock / Not … MCX Virtus 9" Caliber Exchange Kit - 300BLK. The official conversion kit for your SIG MCX Virtus. 5. (23) Availability: In Stock. Price $699.99. or 4 interest-free payments of $175.00 with. ⓘ. The 6.75” is the smallest footprint you can get with the Virtus platform for .300 BLK. So in that regard it is 2.25” better than the 9”. But you still gain all the modularity and parts comparability the Virtus offers over the Rattler. Best answer is to buy one Virtus and one Rattler.Free-floating M-LOK handguards matched with a PDW upper and 5.5" barrel, the MCX Rattler PSB is the ideal choice for fast-moving operators. Romeo4T Red Dot Features: Runtime in excess of 100,000 hours with solar and battery usage. Users can select from 4 different integrated reticle options (Dot, Circle-Dot, Dot with Holds, Circle-Dot with Holds)

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Jan 19, 2024 ... Looking for a product featured in this video? YouTube prevents us from posting links. Head over to our website to find what you're looking ...Will definitely pick this up as my choice for 300blk. I was mulling over the Sig Rattler, but the extra 2" of barrel is not a deal breaker for me, and I would prefer the ability to swap …Save big on Sig Sauer MCX RATTLER 300BLK with NO TAX plus FAST & FREE shipping on orders over $199! Authorized stocking dealer, call (985) 269-7799 to talk to a Sig Sauer expert! ... Free-floating M-LOK handguards matched with a PDW upper and 5.5" barrel, the MCX Rattler PCB is the ideal choice for fast-moving operators. Notable Features ...Save big on Sig Sauer MCX RATTLER 300BLK with NO TAX plus FAST & FREE shipping on orders over $199! Authorized stocking dealer, call (985) 269-7799 to talk to a Sig Sauer expert! ... Free-floating M-LOK handguards matched with a PDW upper and 5.5" barrel, the MCX Rattler PCB is the ideal choice for fast-moving operators. Notable Features ...No. Item Description: Up for grabs is a lightly used Sig Sauer Rattler 300 BLK 5.5" upper kit. This setup is no longer offered by Sig. Includes the match trigger and adapter to be used on any standard AR15 lower and paired with a stock/brace if desired. Not pictured is the factory handguard it comes with (see stock photo).Sig Rattler 300 Blackout complete upper conversion kit. Includes Upper, BCG, Charge Handle, Rear Picatinny Adapter, Trigger and pictured. Has 80 rounds on it, in great shape and worked flawlessly. - $1250 Shipped Eotech EXPS2. Bought over the summer, has approx 300 rounds on it. It’s in great shape, glass is perfect and everything works as it ... The Sig Sauer MCX Rattler Upper Receiver boasts a 5.5-inch barrel and a polymer handguard equipped with MLOK attachment points. It also sports a full-length picatinny rail to facilitate the easy installation of sights, optics, and various accessories. What's more, this upper receiver package includes a receiver stock adapter kit, a side-folding ... Currently have a couple MCXs. A virtus in 6.75 and a 9 spear LT. The rattler upper receiver has a slightly shorter rail than the virtus/spear and I wanted all the parts to be comparable. 6.75 is - but quieter but with more gas to the face. Accuracy is similar at home defense ranges. The 9 will have better velocity and a bit further reach.Explore caliber converters from SIG SAUER today! ... MCX-RATTLER LT UPPER ASSEMBLY - 6.75" 300BLK Price $1,799.99. Add to Cart. Save Compare. on sale. ….

This gun was designed from the ground up to be as discrete as possible while retaining all the robust capabilities of the MCX. Free-floating M-LOK handguards matched with a PDW upper and 5.5" barrel, the MCX Rattler is the ideal choice for fast-moving operators. Features. Free floating M-Lok handguard. Short stroke gas piston. Midwest Gun Works Fixer-uppers offer lots of opportunities but come with some pitfalls. Fixer-uppers may typically be considered the domain of house flippers, but prospective homeowners are also get...Disordered eating describes a set of dieting behaviors and weight control measures that, although not a formal diagnosis, have a serious impact on a person's wellbeing. Many of the...Find the best deals on Sig Sauer MCX uppers in 300 BLK caliber at Midwest Gun Works, your trusted source for firearm parts and accessories.Sig Sauer SIG MCX Rattler Upper, 300 Blackout, 5.5" Barrel, M-Lok Handguard, Black Finish UAMCX-5B-300-BLK-TAP. Manufacturer.-The top rail goes all the way out to cover up the gas block, so I am not sure if any shorter barrel can go on this upper (like the 5.5 inch rattler barrel).-Takedown pins are TIGHT. I couldn’t get them to budge with the pen my FFL had on the counter. ... I took their abridged rifle class and was able to shoot a 300 blackout Sig Spear with a ...Sig Sauer MCX Rattler .300 BLK 5.5" M-LOK Upper Receiver - $1555.99 Upper Receiver for the Sig Sauer MCX Rattler. Features a 5.5 barrel chambered in .300 Blackout, and a handguard with MLOK attachment points for the installation of lights and lasers. Upper Receiver for the Sig Sauer MCX Rattler. Sig rattler 300blk upper, AR Upper Receivers AR Complete Upper Assemblies 9mm AR Parts AK Products Barrels Bolt Assemblies Charging Handles ... USED - Sig MCX Rattler .300 Blk Pistol Includes; No box, 1x 30rd mag . Specifications; Caliber: 300 BlackOut: Capacity *30 Rounds: Barrel Length: 5.5" Operating System: Gas Piston, Rotating Bolt:, Sig Sauer MCX Rattler LT 300 Blackout Semi-Auto Pistol with Folding Pivoting Contour Brace $2,699.99 Sig Sauer MCX Rattler 5.56 NATO Pistol with 5.5 Inch Barrel and M-LOK Handguard, Available in 300 blackout, 5.56 NATO as well as 7.62X39 calibers. Experience the compact powerhouse, the SIG Sauer MCX Rattler LT, offering …, The SIG Sauer MCX Rattler Upper is available in 5.56 NATO and .300 BLK Calibers. Shooters can convert any Mil-SPEC AR Lower into a MCX Rattler with this upper assembly. Included is the upper assembly, lower receiver stock adapter kit, side folding AR buffer tube knuckler and match duo trigger kit. Xtreme Guns and Ammo stocks a full line of SIG ..., Aug 18, 2023 ... ... SIG MCX® Rattler. Featuring a 5.5″ PDW barrel, the MCX platform has never been more compact or accessible. Ready to go wherever it's needed ..., The MCX-RATTLER LT offers a 6.75” cold hammer forged barrel, compatibility with AR-style triggers, an adjustable gas system for suppressor optimization, a QD Clutchlok …, Sig Rattler .300 BLK Muzzle Devices (Blast Shield) Running a rattler unsupressed, the short handguard puts your fingers in too close for comfort proximity to the factory flash hider and substantial muzzle blast. I would like to install a simple blast shield to extend the muzzle out an extra inch or so and direct the blast energy out in front of me., Item Description: Up for grabs is a lightly used Sig Sauer Rattler 300 BLK 5.5" upper kit. This setup is no longer offered by Sig. Includes the match trigger and adapter to be used on any standard AR15 lower and paired with a stock/brace if desired. Not pictured is the factory handguard it comes with (see stock photo)., Sig Sauer SIG MCX Rattler Upper, 300 Blackout, 5.5" Barrel, M-Lok Handguard, Black Finish, Includes Charging Handle, Carrier, Sig Duo Matchlite Trigger & 1913 Adapter to convert Standard AR lower to accept MCX Upper UAMCX-5B-300-BLK-TAP. NW Armory is Portland, Tigard, and Scottsdale's Premier Firearm Store, Family-Owned and Service Oriented., Sig Mcx Rattler Upper 300Blk 5.5" Manufacturer: Sig Sauer. SKU: 275918. Manufacturer part number: UAMCX-5B-300-BLK-TAP. UPC: 798681587735. Complete 5.5" upper assembly kit for your MCX Rattler in 300BLK. Convert any MIL-SPEC AR Lower into a MCX Rattler. Complete with upper assembly lower receiver stock adapter kit side …, The Sig Sauer MCX Rattler Upper Receiver boasts a 5.5-inch barrel and a polymer handguard equipped with MLOK attachment points. It also sports a full-length picatinny rail to facilitate the easy installation of sights, optics, and various accessories. What's more, this upper receiver package includes a receiver stock adapter kit, a side-folding ..., Law Enforcement Sales at 603-610-3820. DOWNLOAD THE LAW ENFORCEMENT CATALOG. FEATURED PRODUCTS. The SIG MCX was engineered for the demands …, Sig Rattler .300 BLK Muzzle Devices (Blast Shield) Running a rattler unsupressed, the short handguard puts your fingers in too close for comfort proximity to the factory flash hider and substantial muzzle blast. I would like to install a simple blast shield to extend the muzzle out an extra inch or so and direct the blast energy out in front of me., DetailsThe SIG MCX Rattler Pistol packs a punch in a compact package. This 5.5" .300 Blackout pistol delivers maximum short-barrel performance that’s easy to store or rapidly deploy when needed. Experience modern enhancements like ambidextrous controls, an adjustable gas piston system for any ammo, and a crisp Matchlite Duo trigger for precise shots.The Rattler boasts a suite of features ..., The MCX Rattler features a dual position gas valve for suppressed and unsuppressed usage. The SIG Sauer MCX Rattler Conversion Kit includes the SIG Sauer MCX Rattler upper receiver with 5.5″ .300 BLK barrel, bolt carrier group, buffer tube eliminator/stock adapter, side folding adapter SIG Sauer Match 2 stage trigger, and QD adapter., Upper Receiver for the Sig Sauer MCX Rattler. Features a 5.5 barrel chambered in .300 Blackout, and a handguard with MLOK attachment points for the installation of lights and lasers. ... Sig Sauer MCX Rattler .300 BLK 5.5" M-LOK Upper Receiver - $1555.99 (Free Shipping over $250) Posted by Hank.Grimer. Updated by boksaman 15 months ago …, RECOIL reviews the new SIG Rattler in .300 AAC Blackout. SIG Rattler A Petite MCX. ... as well as steel pins where the charging handle latches make contact on the upper receiver. The barrel is …, If I had to do it again, I'd just purchase a complete Virtus upper and then get the barrels that I wanted as the 5.5" Rattler barrel isn't much smaller than the 6.75" Virtus barrel. The Virtus upper allows you to use a 6.75" or 9" .300 BLk barrel as well as an 11.5" or 16" 5.56 barrel while you're limited to one size barrel with the Rattler upper., Even with a superb SIG sound suppressor installed, the MCX Rattler is not terribly bulky. The .300 BLK chambering makes the suppressed gun surprisingly quiet. In a pinch, the device would make a superb prod should your foe end up both unarmed and recalcitrant. SIG’s electronic sights will hold their own with the best in the business., Sig Sauer MCX Rattler Complete Upper. This is the SIG MCX Rattler upper. Featuring a 5.5 PDW barrel the MCX platform has never been more compact or accessible. Ready to go wherever it's needed Convert any MIL-SPEC AR Lower into a MCX Rattler. Complete with upper assembly lower receiver stock adapter kit side folding AR buffer tube knuckler and ..., The MCX-Rattler LT also has either a cold hammer forged 6 or 7 3/4 barrel and is now fully compatible with all MCX barrels and handguards making it the ultimate modular package. Features. Cold hammer forged barrel. Fullly ambidextrous controls. Interchangable barrels, now compatible with all LT barrels and handguards. SIG Flatblade match trigger., SIG Rattler 300blk Upper build Bolt Catch question/issue. Tags bolt catch mcx rattler. Jump to Latest Follow 580 views 1 reply 2 participants last post by littlejacks Dec 8, 2022. W. wagswvu Discussion starter 58 posts · Joined 2012 Add to quote; Only show this user #1 ..., Sig Sauer Upper Receiver Assembly Sig MCX Rattler 300 AAC Blackout 5.5" with Tapered Lug M-LOK Handguard Black. Product #: 477378. Manufacturer #: UAMCX-5B-300-BLK-TAP. UPC #: 798681587735. List Price: $1999.00. Our Price: $1699.99. Made in USA. Barrel Length: 5.5 Inches., The MCX / Rattler has better build quality and a quick change barrel system. It runs better dirty and is likely more reliable overall but a bit more expensive. It’s more accurate in my experience and would be my overall choice if I could only have one. It is best with a lower back pressure can. 29., The SIG MCX in a discrete platform ― featuring a 5.5" barrel with PDW upper. Recently selected by USSOCOM for their Reduced Signature Assault Rifle program, this is the SIG MCX Rattler. ... SIG SAUER MCX RATTLER CANEBRAKE 300BLK 5.5" PISTOL - NO BRACE: FFL Required : Alternative Views: $ 2,599.99. UPC: 798681673162 Stock …, I did the conversion with a normal sbr ar lower for the original sig rattler in 300 blk. Works great but I'm thinking of the same thing. New upper, or the whole thing. After getting an MPX complete, I'm thinking of just getting the whole new thing and putting something else on this lower., SIG MCX RATTLER UPPER 300BLK 5.5" Item : XIUAMCX5B300BLKTAP. SKU : UAMCX5B300BLKTAP. Model : UPC : 798681587735. $1,999.00 $1,704.62 Make Offer %local_inventory_count ... , Upper Receiver for the Sig Sauer MCX Rattler. Features a 5.5 barrel chambered in .300 Blackout, and a handguard with MLOK attachment points for the installation of lights and lasers. ... Sig Sauer MCX Rattler .300 BLK 5.5" M-LOK Upper Receiver - $1555.99 (Free Shipping over $250) Posted by Hank.Grimer. Updated by boksaman 15 months ago …, Aug 18, 2023 ... ... SIG MCX® Rattler. Featuring a 5.5″ PDW barrel, the MCX platform has never been more compact or accessible. Ready to go wherever it's needed ..., Sig Sauer. MCX | 300 BLK | Rattler | 5.5" | Pistol $2,499.99. Out of Stock. SALE. Sig Sauer. Cal X-Kit | MCX | 300 BLK | 6.75" $649.99 $579.99. Out of Stock. 1 Review Hide Reviews Show Reviews 5 MCX VIRTUS | 300 BLK | 9" UPPER. Posted by ALLEN on Jan 2nd 2023 My first 300 Blackout and I am SUPER HAPPY with the …, Sig Sauer MCX Spear LT 7.62x39 Pistol 11.5" 28rd FDE - PMCX-762R-11B-LT. Regular Price $2,999.99 Special Price $2,499.99. Add to Cart. Add to Wish List Add to Compare., Sig Sauer MCX Rattler Complete Upper. This is the SIG MCX Rattler upper. Featuring a 5.5 PDW barrel the MCX platform has never been more compact or accessible. Ready to go wherever it's needed Convert any MIL-SPEC AR Lower into a MCX Rattler. Complete with upper assembly lower receiver stock adapter kit side folding AR buffer tube knuckler and ..., Buy Sig Sauer MCX Rattler .300 BLK 5.5" M-LOK Upper Receiver UAMCX-5B-300-BLK-TAP from Scopelist - Authorized Online Dealer. Free and fast shipping over $250 + Free MVP Membership on purchases over $500.