Lower & Upper Receivers

The LMT Defense Rail Mounted M203 Receiver + 9" M203 Barrel Bundle (L2B1-LMP380) combines two of LMT's most sought-after 40mm grenade launcher components into one package: the Rail Mounted M203 Receiver (L2B1) and the 9" M203 Barrel Assembly (LMP380)...

The LMT Defense Flat Top Upper Receiver (L7D1A) is a mil-spec AR-15 flat top upper receiver machined from forged 7075-T6 aluminum with a Type III hard anodized finish. Featuring a standard flat top Picatinny (MIL-STD-1913) rail, this upper receiver is...

LMT Defense - MRP-L MLOK 11.5" Specwar - AR15 Upper Receiver - #L7Z1A The patented LMT monolithic rail platform (MRP) upper receiver, has a receiver and handguard that are made from a single piece of aerospace grade aluminum. The barrel is held in place...

The durability, reliability and excellent build quality of Colt uppers will provide years of service you can count on. M4 Feed Ramps Forward Assist Upper Receiver

LWRC M6 IC Enhanced Lower Receiver is fully ambidextrous, with a safety selector, mag release and bolt stop. These are semi auto receivers are stamped with 5.56 full auto markings.The LWRC M6 IC Enhanced Lower Receiver comes standard with LWRC enhanced...

The LMT Defense MARS-H SOPMOD Complete AR10 Lower Receiver (LM308AM) brings LMT's award-winning Modular Ambidextrous Rifle System to the large-frame .308/7.62x51mm MWS platform. The MARS-H features fully ambidextrous controls machined directly into the...

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 Assembly 7009 UPC 639266299240 Complete Origin 12...

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 sling socket, and M-LOK rails for accessories. The...

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 accessories. The manufacturer part number is M76-15.

The LMT Defense Complete MARS-L SOPMOD Lower Receiver (M7DA4) is the full-featured SOPMOD-configuration MARS-L complete lower receiver. The LMT® Modular Ambidextrous Rifle System (MARS®) lower receiver features fully ambidextrous selector, magazine...

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 uses a rail-mounted design with three recoil lugs and...

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 M203 barrels (sold separately) and is compatible with the...