AR-15 Parts
Shop our extensive inventory of AR-15 parts and modern sporting rifle (MSR) components. From fully assembled MIL-SPEC upper receivers and enhanced lower parts kits to free-float M-LOK handguards and ambidextrous controls, we carry the critical components required for duty, defense, and custom builds.
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J P Enterprises AR15 6.5 Grendel/ 6mm ARC Complete Bolt Assembly JPBC-EB6.5G
JP Enterprises
$155.75The JP Enterprises AR-15 6.5 Grendel / 6mm ARC Complete Bolt Assembly Enhanced (JPBC-EB6.5G) is a precision-machined, enhanced bolt assembly built from SAE 9310 nickel-chromium-molybdenum steel — the same high-strength alloy used in Formula 1...$155.75 -
KAC Knight's Armament SR-15 URX-6 Notched Handguard, 10.5" 122025
Knights Armament Company
$287.28The KAC Knight's Armament SR-15 URX-6 Notched Handguard 10.5" (KAC PN: 122025) is KAC's latest generation URX-6 free-float handguard designed for the SR-15 platform in a 10.5" length for CQB and SBR configurations. The URX-6 notched design features...$287.28 -
Proof Research 16" Carbon Fiber 223 Wylde Barrel 1:8- 5/8-24 143254
Proof Research
$1,149.00The Proof Research 16” .223 Wylde Carbon Fiber AR-15 Barrel (143254) combines the versatility of the .223 Wylde chamber — which accepts both .223 Remington and 5.56 NATO ammunition — with Proof Research’s world-class carbon fiber...$1,149.00 -
KAC Knights Armament SR-15 Stripped Ambi Lower Factory Blem 123689
Knights Armament Company
$749.00The KAC Knight's Armament SR-15 Stripped Ambidextrous Lower Receiver — Factory Blem (KAC PN: 123689) is a genuine Knight's Armament SR-15 ambidextrous stripped lower receiver, offered as a factory blemished unit at a significant savings compared to the...$749.00 -
VLTOR MUR-1A Modular Upper Receiver-KG Gun-Kote MUR-1A-KG-B
Vltor Weapon Systems
$242.96The VLTOR MUR-1A Modular Upper Receiver with KG Gun-Kote finish (MUR-1A-KG-B) provides the precision 7075 T6 aluminum MUR-1A upper receiver with a premium Cerakote/KG Gun-Kote finish for enhanced corrosion resistance and a durable, matte appearance. The...$242.96 -
Out of stock
LMT Defense MRP-L MLOK 10.5" Complete Upper Receiver Bundle LMTMLOKS10.5AS
LMT Defense
$1,625.00The LMT Defense MRP-L M-LOK 10.5" AR-15 Complete Upper Receiver Bundle (LMTMLOKS10.5AS) is a factory-complete LMT upper receiver assembly for AR-15/SBR builds, combining LMT's 9.25" M-LOK monolithic upper receiver chassis with a 10.5" 5.56 NATO...$1,625.00 -
Out of stock
LMT Defense MRP-L Quad Rail 10.5" Complete Upper Receiver Bundle #LMTQuadS10.5AS
LMT Defense
$1,625.00LMT Defense - MRP-L Quad Rail 9.25" AR15 Upper Receiver - #L7S1A 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...$1,625.00 -
LMT Defense MRP-L Quad Rail 13.25" AR15 Complete Upper Receiver LMTQuadL16AS
LMT Defense
$1,700.00The LMT Defense MRP-L Quad Rail 13.25" AR-15 Complete Upper Receiver (LMTQuadL16AS) is a factory-complete LMT upper receiver assembly — including the 13.25" quad rail monolithic upper receiver chassis, a 16" 5.56 NATO chrome-lined barrel, LMT enhanced...$1,700.00 -
Out of stock
LMT Defense MRP-L MLOK 16" Complete Upper Receiver Bundle #LMTMLOKL16AS
LMT Defense
$1,700.00MRP-L MLOK 13.25" AR15 Upper Receiver - #L7Y1A 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 with a proprietary...$1,700.00 -
VLTOR MUR-1A Modular Upper Receiver w/ Bolt Assist Tan MUR-1A-T
Vltor Weapon Systems
$242.96The VLTOR MUR-1A Modular Upper Receiver in Tan (MUR-1A-T) provides the same precision 7075 T6 aluminum construction of the black MUR-1A in a Tan (FDE/Coyote-compatible) finish for coordinated FDE or Multicam AR-15 builds. The Tan MUR-1A is a stripped...$242.96 -
Proof Research 338ARC 16" Carbon Fiber .338 ARC Barrel 145609
Proof Research
$1,149.00The Proof Research .338 ARC 16" Carbon Fiber Barrel (145609) is one of the first precision carbon fiber barrels available for the .338 ARC (Advanced Rifle Cartridge) — a powerful, medium-bore AR-platform cartridge designed for extended range barrier...$1,149.00 -
San Tan Tactical Lower Parts Kit STT-LPK
San Tan Tactical
$40.00San Tan Tactical Complete lower receiver parts kit for AR-15 are a great addition to your AR15 build. From amateur gun builder to seasoned expert gun smith, this lower parts kit is for you. Just add your favorite Trigger, AR-15 Lower, Buffer Tube...$40.00