Quick view 8.5″ 300 BO BLACK UPPER FS CONE MSRP: $360.99 - $390.99 Was: Now: $314.99 - $369.99 Choose Options Compare
SALE Quick view 10" 300 BLACKOUT COMPLETE UPPER ASSEMBLY (BUILT) MSRP: $399.99 Was: $349.99 Now: $339.99 Add to Cart Compare
SALE Quick view 16" 300 BLACKOUT COMPLETE UPPER ASSEMBLY (BUILT) MSRP: $399.99 Was: $359.99 Now: $349.99 Add to Cart Compare
SALE Quick view 8" 300 BLACKOUT COMPLETE UPPER ASSEMBLY WITH BCG (BUILT) MSRP: $399.99 Was: $339.99 Now: $329.99 Add to Cart Compare
SALE Quick view 5" .300 BLACKOUT UNASSEMBLED PISTOL KIT W/LPK MSRP: $410.99 Was: $380.99 Now: $369.99 Add to Cart Compare
SALE Quick view 5" 300 BLACKOUT COMPLETE UPPER ASSEMBLY WITH BCG (BUILT) MSRP: $399.99 Was: $359.99 Now: $349.99 Add to Cart Compare
Quick view AR-15 300 Blackout 7.5″ Pistol Upper Complete Build Kits Unassembled Black barrel Upper MSRP: $560.99 - $569.99 Was: Now: $450.99 - $475.99 Choose Options Compare
Quick view AR-15 300 blackout 16″ Rifle Upper Complete Build Kits Assembled Black barrel Upper MSRP: $570.99 - $580.99 Was: Now: $490.99 - $510.99 Choose Options Compare
Quick view 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
Quick view AR-15 300 Blackout 7.5″ Pistol Upper Complete Build Kits Assembled Black barrel Upper MSRP: $550.99 - $560.99 Was: Now: $470.99 - $490.99 Choose Options Compare
SALE Quick view AR-15 Pistol Upper 10.5" 300 Blackout MSRP: $330.99 Was: $309.99 Now: $299.99 Choose Options Compare
SALE Quick view AR-15 Pistol Upper, .300 Blackout, 10.5” Barrel, 1:8 Twist, Pistol Gas System MSRP: $420.99 Was: $379.99 Now: $315.99 Choose Options Compare
Quick view 8.5″ 300 BO BLACK UPPER FS CONE AR15 300 BO upper comes FULLY ASSEMBLED Includes: Upper Receiver 300 BO BARREL 8.5″ XTS Charging Handle XTS Forward Assist XTS Ejection Port Cover 9″ M-LOK RAIL Black Gas Block Gas Tube Forward Sounding Flash Cone (MZ FS308S) MSRP: $360.99 - $390.99 Was: Now: $314.99 - $369.99 Choose Options Compare
SALE Quick view 10" 300 BLACKOUT COMPLETE UPPER ASSEMBLY (BUILT) (BUILT) 10" 300 BLACKOUT USA MADE COMPLETE UPPER ASSEMBLY WITH BCG MSRP: $399.99 Was: $349.99 Now: $339.99 Add to Cart Compare
SALE Quick view 16" 300 BLACKOUT COMPLETE UPPER ASSEMBLY (BUILT) (BUILT) 16" 300 BLACKOUT USA MADE COMPLETE UPPER ASSEMBLY WITH BCG MSRP: $399.99 Was: $359.99 Now: $349.99 Add to Cart Compare
SALE Quick view 8" 300 BLACKOUT COMPLETE UPPER ASSEMBLY WITH BCG (BUILT) 8" 300 BLACKOUT USA MADE COMPLETE UPPER ASSEMBLY WITH BCG (BUILT) MSRP: $399.99 Was: $339.99 Now: $329.99 Add to Cart Compare
SALE Quick view 5" .300 BLACKOUT UNASSEMBLED PISTOL KIT W/LPK 5" .300 BLACKOUT UNASSEMBLED PISTOL KIT W/LPk MSRP: $410.99 Was: $380.99 Now: $369.99 Add to Cart Compare
SALE Quick view 5" 300 BLACKOUT COMPLETE UPPER ASSEMBLY WITH BCG (BUILT) (BUILT) USA Made 5" 300 BLACKOUT COMPLETE UPPER ASSEMBLY Our USA Made Upper assemblie is one of our many options for an AR-15 Assembled Upper receiver. Our specialty is designing custom built upper receiver that only use the best USA Made parts at the... MSRP: $399.99 Was: $359.99 Now: $349.99 Add to Cart Compare
Quick view AR-15 300 Blackout 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: $560.99 - $569.99 Was: Now: $450.99 - $475.99 Choose Options Compare
Quick view AR-15 300 blackout 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: $570.99 - $580.99 Was: Now: $490.99 - $510.99 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 AR-15 300 Blackout 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: $550.99 - $560.99 Was: Now: $470.99 - $490.99 Choose Options Compare
SALE Quick view AR-15 Pistol Upper 10.5" 300 Blackout Our complete AR15 300BO Upper Assembly. With an Anchor Harvey Upper and an MCS Hand Guard, this will make your next build the ultimate AR. Includes: ANCHOR HARVEY Upper Receiver 300BO NATO BARREL 10.5" MCS Charging Handle MCS Forward Assist MCS... MSRP: $330.99 Was: $309.99 Now: $299.99 Choose Options Compare
SALE Quick view AR-15 Pistol Upper, .300 Blackout, 10.5” Barrel, 1:8 Twist, Pistol Gas System Model: AR-15 Pistol Upper, .300 Blackout, 10.5'' Barrel, 1:8 Twist, Pistol Gas System Unique Characteristics: This .300 Blackout AR-15 Pistol Upper receiver, assembled by MCS, is one of our many options for an AR-15 Assembled Upper receiver. Our... MSRP: $420.99 Was: $379.99 Now: $315.99 Choose Options Compare
