Lower & Upper Receivers
Build your AR-15, AR-10, or precision long-range rifle exactly how you want it. Shop our high-quality stripped and complete lower and upper receivers, matched receiver sets, and enhanced buffer systems.
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LMT Defense - MARS-L Stripped AR15 Lower Receiver - R-M7SL
LMT Defense
MSRP: $380.00$352.35The 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...MSRP: $380.00$352.35 -
LMT Defense - MRP-L Quad Rail 13.25" AR15 Upper Receiver - L7RA1A
LMT Defense
$940.50The 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...$940.50 -
LMT Defense - MRP-L Quad Rail 9.25" AR15 Upper Receiver - L7S1A
LMT Defense
$890.10The 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...$890.10 -
LMT Defense - MRP-L MLOK 13.25" AR15 Upper Receiver - L7Y1A
LMT Defense
$940.50The 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...$940.50 -
LMT Defense - MRP-L MLOK 11.5" Specwar - AR15 Upper Receiver - L7Z1A
LMT Defense
$940.50The 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...$940.50 -
LMT Defense Pistol Lower MIDMLK125-MARS-LOWER
LMT Defense
$899.00Pistol Lower from Exclusive 12.5" MARS-L Specwar Pistol MIDMLK125-MARSP The LMT Defense Pistol Lower is the full-featured$899.00 -
KAC Knights Armament Company SR-25 A3 6.5 CM 22" Upper Receiver 100223
Knights Armament Company
$3,283.20The 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...$3,283.20 -
LMT Defense MRP-L M-LOK 9.25" "Grenadier" Upper Receiver L7SXG1A
LMT Defense
$940.50The 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...$940.50 -
LMT Defense MRP-L M-LOK 9.25" "Hybrid" Upper Receiver L7SX1A
LMT Defense
$940.50The 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...$940.50 -
Ruger 10/22 Stripped Aluminum Receiver VCSCU-0130
Ruger
$65.00This 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...$65.00 -
SONS OF LIBERTY GUN WORKS - STRIPPED UPPER RECEIVER - HARDCOAT TYPE III ANODIZED - UPPER-STRIPPED
Sons of Liberty Gunworks
$150.00Sons of Liberty Gun Works believes in Quality Mil-Spec or better parts. They believe there is no substitute for quality and that your gun should be built right the first time, ready for hard use...$150.00 -
LMT Defense - MRP-L Compact Length AR-15 Upper Receiver - M-LOK - 7.25" - L7NX1A
LMT Defense
$890.10The LMT Defense MRP-L Compact M-LOK 7.25" AR-15 Upper Receiver (L7NX1A) is LMT's most compact Monolithic Rail Platform upper, purpose-built for pistol-length and ultra-compact 5.56 NATO and .300...$890.10