Lower & Upper Receivers

The LMT Defense MRP-L M-LOK 11.5" AR15 Upper Receiver (L7Z1A) 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 providing...

The Knights Armament SR-25 AMBI V2 Lower Receiver Kit  (121461) is a factory-complete lower assembly built for KAC's SR-25 platform in 7.62 NATO / .308 Win. It's forged from 7075-T6 aluminum and finished with a mil-spec Type III hardcoat anodize,...

Pistol Lower from Exclusive 12.5" MARS-L Specwar Pistol MIDMLK125-MARSP The LMT Defense Pistol Lower is the full-featured configuration lower. The LMT® Modular Ambidextrous Rifle System (MARS®) lower receiver features a fully ambidextrous...

The Knights Armament SR-25A2 20" Upper Receiver Kit brings genuine military heritage to the civilian AR-10 platform. As the commercial counterpart to the M110A2 — the U.S. military's semi-automatic sniper system — this upper receiver kit is...

The KAC SR-25 A3 complete upper receiver is chambered in 6.5 Creedmoor and built for precision long-range shooting on the SR-25/AR-10 platform. It arrives complete and drop-in ready for compatible lowers. The 22" 4150 CMV steel barrel features a dimpled,...

This is a new Knights Armament Company SR-15 KS2 14.5” complete upper receiver kit chambered in 5.56 NATO. This upper receiver features a 14.5” cold hammer forged, chrome lined, 1:7” rate of twist, 3-prong QDC flash hider, URX6 M-LOK...

This is a new Knights Armament Company SR-25 KS7 14.5” complete upper receiver kit chambered in 6.5 Creedmoor. This upper receiver features a 14.5” cold hammer forged, dimpled hybrid barrel, medium profile, chrome lined, 1:7.5” rate of...

The LMT Defense MRP-L M-LOK 9.25" "Grenadier" Upper Receiver (L7SXG1A) is LMT's newest 2026 MRP-L upper receiver, purpose-designed for under-barrel launcher integration and versatile accessory mounting. The "Grenadier" name comes from the full-length...

The LMT Defense MRP-L M-LOK 9.25" "Hybrid" Upper Receiver (L7SX1A) is LMT's newest 2026 addition to their Monolithic Rail Platform lineup — a versatile carbine-length upper designed for both piston and direct impingement operation. The "Hybrid"...

This is a new Ruger factor stripped aluminum receiver compatible with 10/22 pattern firearms.  Black Stripped Made in the USA Note: These are stripped receivers so they will not come with any internal components. Being a serialized item, an...

This is a new Ruger factor stripped aluminum receiver compatible with 10/22 pattern firearms.  Black Stripped Made in the USA Note: These are stripped receivers so they will not come with any internal components. Being a serialized item, an...

Our M16A4 Clone Lower Receiver features custom engraving on our AR15 Gen 2 Lower Receiver and is the perfect base for your M16A4 clone build. These lowers do not have engraving on the right side of the magwell. Features: Custom Aero Precision...