Upper Receivers

MCX-SURG - Suppressed Upper Receiver Group - ***These are currently shipping in waves, and orders will be shipped out in the order they were received.*** SIG SAUER is proud to introduce...

This is a new Stern Defense MOD4 complete Glock compatible complete upper receiver chambered in 9mm Luger. It features a 4-inch barrel, MBC blast can, free float M-LOK handguard, full length...

This is a factory new never fired Ruger MK IV stripped barreled receiver chambered for .22 LR. This upper comes with adjustable sights and a 4 ½-inch stubby pencil profile barrel.  The push-button...

Fostech Origin 12 SBS Barrel Assembly. Complete upper receiver for your Fostech Origin 12 shotgun. Features a 9.75" barrel and is perfect for your SBS build.  Fostech Origin 12 SBS Barrel...

Use what THEY use. The Daniel Defense MK18 Upper Receiver Group features the railed forend Daniel Defense currently provides to USSOCOM and a 10.3" Cold Hammer Forged Barrel. The MK18 Rail...

This is a new Sons of Liberty Gunworks M76 9.5-inch wedge lock rail compatible with AR-15 pattern firearms. It features aluminum construction, top mounted picatinny rail, 4140 Steel barrel nut, QD...

The Sons of Liberty Gun Works M76 M-LOK Handguard features their new wedgelock attachment system that keeps the free float handguard locked tight against the 4140 steel barrel nut. This is the 10.5”...

This is a new Sons of Liberty Gunworks M76 15-inch wedge lock rail compatible with AR-15 pattern firearms. It features aluminum construction, top mounted picatinny rail, and M-LOK rails for...

The LMT Defense Rail Mounted M203 Receiver (L2B1) is a 40mm grenade launcher receiver engineered for mounting to any standard 1913 Picatinny rail. Unlike the classic barrel-mounted M203, the L2B1...

The LMT Defense Classic M203 Receiver (LMP300E) is a mil-spec 40mm under-barrel grenade launcher receiver designed for M16/M4 platform rifles. This Type 1 barrel-mounted receiver accepts standard...

The Daniel Defense Lower Parts Kit, Semi-Auto is for those interested in assembling their own AR15. Although there are many manufacturers of so-called MIL-SPEC parts, we have gone to great lengths to...

The LMT Defense MRP-L Quad Rail (Picatinny) 13.25" AR15 Upper Receiver (L7RA1A) features the patented LMT Monolithic Rail Platform (MRP™) — the upper receiver and handguard are machined from a single...