AR-15 7.62×39 7.5″ Pistol Upper Complete Build Kits Assembled Black barrel Upper MSRP: $570.99 - $580.99 Was: Now: $490.99 - $500.99 Choose Options Compare
AR-15 Upper Build kit .223 Wylde, 18″ Stainless Barrel, 1:8 Twist, Mid Length Gas System MSRP: $360.99 Was: $345.99 Now: $325.99 Choose Options Compare
AR-15 9 mm 16″ Rifle Upper Complete Build Kits Assembled Black barrel Upper MSRP: $589.99 - $599.99 Was: Now: $499.99 - $510.99 Choose Options Compare
AR-15 9 mm 7.5″ Pistol Upper Complete Build Kits Unassembled Black barrel Upper MSRP: $550.00 - $550.99 Was: Now: $460.99 - $480.99 Choose Options Compare
7″ AR BUILD KIT 5.56/.223 BCG / LPK / SB BRACE COMP-BLD07SB MSRP: $645.99 Was: $549.99 Now: $539.99 Compare
AR-15 9 mm 7.5″ Pistol Upper Complete Build Kits Assembled Black barrel Upper MSRP: $560.99 - $570.99 Was: Now: $489.99 - $499.99 Choose Options Compare
AR-15 300 blackout 10.5″ Pistol Upper Complete Build Kits Assembled Black barrel Upper MSRP: $560.99 - $570.99 Was: Now: $480.99 - $500.99 Choose Options Compare
AR-15 Upper Receiver .350 Legend, 16″ Parkerized M4 Barrel, 1:16 Twist, Carbine Length Gas System MSRP: $400.99 Was: $340.99 Now: $320.99 Choose Options Compare
AR-15 5.56 NATO 5'' PISTOL KIT - FORGED UPPER WITH 4'' M LOK RAIL - INCLUDED GOLD BCG MSRP: $509.99 Was: Now: $415.99 Add to Cart Compare
Quick view AR-15 7.62×39 7.5″ Pistol Upper Complete Build Kits Assembled Black barrel Upper MCS is now proud to offer the AR-15 Assembled Pistol Build Kit. With this build kit, you will be able to have almost all of the necessary components to build your very own AR-15 Pistol. AR-15 Assembled Pistol Upper Receiver Components: A fully assembled... MSRP: $570.99 - $580.99 Was: Now: $490.99 - $500.99 Choose Options Compare
SALE Quick view AR-15 Upper Build kit .223 Wylde, 18″ Stainless Barrel, 1:8 Twist, Mid Length Gas System AR-15 Upper Receiver: .223 Wylde, 18" Stainless Barrel, 1:8 Twist, Mid Length Gas System Unique Characteristics: This .223 Legend AR-15 Upper receiver, assembled by MCS, is one of our many options for an AR-15 Assembled Upper receiver. Our... MSRP: $360.99 Was: $345.99 Now: $325.99 Choose Options Compare
Quick view Slick Side Stripped Upper Receiver Kit High quality, lightweight Slick Side Billet Upper Receiver Aluminum. Made in the U.S.A Features: USA Made Billet Aluminum Slick Side No Forward Assist Low Profile Brass Deflector Black Anodized finish Flat-Top with Picatinny rails Mil-Spec... MSRP: $110.99 Was: Now: $98.99 Add to Cart Compare
Quick view AR-15 9 mm 16″ Rifle Upper Complete Build Kits Assembled Black barrel Upper MCS is now proud to offer the AR15 Assembled Rifle Build Kit. With this build kit, you will be able to have almost all of the necessary components to build your very own AR-15 Rifle ! AR15 Assembled Rifle Upper Receiver Components: A fully assembled... MSRP: $589.99 - $599.99 Was: Now: $499.99 - $510.99 Choose Options Compare
Quick view AR-15 9 mm 7.5″ Pistol Upper Complete Build Kits Unassembled Black barrel Upper MCS is now proud to offer the AR-15 Unassembled Pistol Build Kit. With this build kit, you will be able to have almost all of the necessary components to build your very own AR-15 Pistol ! AR-15 Unassembled Pistol Upper Receiver Components: A fully... MSRP: $550.00 - $550.99 Was: Now: $460.99 - $480.99 Choose Options Compare
Quick view 5.5" BufferLess 9mm Complete Upper Kit BufferLess Self-contained blowback upper that works on Mill spec AR-15 and 9mm uppers. The MCS Complete 9mm Upper fits most AR-15/AR-9 Lowers. This upper features a 5.5-inch barrel crafted from 4140 steel with a black nitride finish. The billet aluminum... MSRP: $899.99 Was: Now: $679.99 Add to Cart Compare
SALE Quick view 7″ AR BUILD KIT 5.56/.223 BCG / LPK / SB BRACE COMP-BLD07SB Our complete AR15 5.56 Build Kit comes with a FULLY ASSEMBLED Upper, Lower Parts Kit and Buffer tube Assembly and Brace. Capable of shooting both .223 and 5.56. Includes: Upper Receiver 5.56 NATO BARREL 7.5″ XTS Charging Handle XTS Forward... MSRP: $645.99 Was: $549.99 Now: $539.99 Compare
Quick view AR-15 9 mm 7.5″ Pistol Upper Complete Build Kits Assembled Black barrel Upper MCS is now proud to offer the AR-15 Assembled Pistol Build Kit. With this build kit, you will be able to have almost all of the necessary components to build your very own AR-15 Pistol ! AR-15 Assembled Pistol Upper Receiver Components: A fully... MSRP: $560.99 - $570.99 Was: Now: $489.99 - $499.99 Choose Options Compare
Quick view AR-15 300 blackout 10.5″ Pistol Upper Complete Build Kits Assembled Black barrel Upper MCS is now proud to offer the AR-15 Assembled Pistol Build Kit. With this build kit, you will be able to have almost all of the necessary components to build your very own AR-15 Pistol ! AR-15 Assembled Pistol Upper Receiver Components: A fully... MSRP: $560.99 - $570.99 Was: Now: $480.99 - $500.99 Choose Options Compare
Quick view .45 ACP 7.5" PISTOL KIT W/ LPK .45 ACP 7.5" PISTOL KIT W/ LPK MSRP: $430.99 Was: Now: $420.99 Add to Cart Compare
SALE Quick view AR-15 Upper Receiver .350 Legend, 16″ Parkerized M4 Barrel, 1:16 Twist, Carbine Length Gas System Model: AR-15 Upper Receiver, .350 Legend, 16" Parkerized M4 Barrel, 1:16 Twist, Carbine Length Gas System Unique Characteristics: This .350 Legend AR-15 Upper receiver, assembled by MCS, is one of our many options for an AR-15 Assembled Upper receiver... MSRP: $400.99 Was: $340.99 Now: $320.99 Choose Options Compare
Quick view AR-15 5.56 NATO 5'' PISTOL KIT - FORGED UPPER WITH 4'' M LOK RAIL - INCLUDED GOLD BCG Includes: 5.56 NATO PISTOL 5" INCH PISTOL LENGTH BARREL 1:5 5R TWIST - BLACK NITRIDE (MADE IN USA) AR-15 Tactical Charging Handle AR-15 Combat M-Lok Handguard - Black .223/5.56 Polished Aluminum Lightweight Competition Bolt Carrier Group - Gold AR-15/... MSRP: $509.99 Was: Now: $415.99 Add to Cart Compare