Lower & Upper Receivers

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...

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 ensure the parts we provide are of the...

The Knight's Armament SR-15 IWS Complete Lower Receiver comes with with a Magpul stock and six-position buffer tube. The ambidextrous bolt release, selector lever, and magazine release offers left-handed users the ergonomic advantages inherent to...

The MARS-H brings the innovative design of our MARS-L to the MWS® platform. The LMT® Modular Ambidextrous Rifle System (MARS®) lower receiver offers ambidextrous controls to include: selector, magazine release and bolt catch and release...

The Defender-H lower receiver, also known as the original LMT .308 Modular Weapon System (MWS) lower receiver, is an intermediate-caliber receiver designed specifically for use with LMT’s MWS upper receivers. Features include standard AR15 pattern...

The LMT Defense MARS-L Stripped AR15 Lower Receiver (R-M7SL) is the foundation of the legendary LMT MARS® system. The LMT® Modular Ambidextrous Rifle System (MARS®) lower receiver sets a new standard for ambidextrous AR-15 controls. The MARS-L features...

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 piece of forged aerospace-grade aluminum, eliminating...

The LMT Defense MRP-L Quad Rail (Picatinny) 9.25" AR15 Upper Receiver (L7S1A) features the patented LMT Monolithic Rail Platform (MRP™) — the upper receiver and handguard are machined from a single piece of forged aerospace-grade aluminum, eliminating...

The LMT Defense MRP-L M-LOK 13.25" AR15 Upper Receiver (L7Y1A) features the patented LMT Monolithic Rail Platform (MRP™) — the upper receiver and handguard are machined from a single piece of forged aerospace-grade aluminum, eliminating flex and...