Whether you're upgrading performance or starting a new build, each part is vetted for reliability and compliance.
Heckler & Koch MR762 A4 Upper Receiver, 308 Winchester/762NATO, 13 Barrel, Threaded 5/8X24, M-LOK Handguard, Anodized Finish, Black, Adjustable Gas Block, Includes Bolt Carrier Group, Buffer Weight, and Buffer Spring 51001919
Heckler & Koch
MR762 A4 Upper Receiver
51001919
$2649.00
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Great Lakes Firearms & Ammunition AR-15 Stripped Lower Receiver — Aluminum Black
Great Lakes Firearms
GL15 BLK-S
GL15 BLK-S
$99.98
In-Store Today
WLA WLA-UPR-2001-01 AR15 UPPER RECEIVER FORGED
VKTR Industries
WLAUPR200101
$108.42
Ships from Warehouse
Wilson Combat TRLOWERKB15 Lower Receiver Kit Rifle Universal
Wilson Combat
TR-LOWERK-B15
TRLOWERKB15
$57.95
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FAXON URSSB556-SS-W ARAK21 16 556 COMP UPPER TNG
Faxon Firearms
URSSB556SSW
$1131.31
Ships from Warehouse
FAXON URSSB556-SS-MB ARAK21 16 556 COMP UPPER MB
Faxon Firearms
URSSB556SSMB
$1083.12
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American Defense Mfg. UIC BILLET, Semi-automatic, Stripped Lower Receiver, 223 Remington/556NATO, Anodized Finish, Black, Includes Installed Ambidextrous Magazine Release and Bolt Catch AD-UICLS-BLK
American Defense Mfg
UIC15
AD-UICLS-BLK
$402.04
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ZAFFIRI 17.5.UPK UPPER PARTS KIT GLK 17/34 G5
Zaffiri Precision
UPK
17.5.UPK
$89.99
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RECEIVER SET AR-15 BILLET TR-LOWUPP-BIL-ATB
Wilson Combat
Billet Upper/Lower Set
TR-LOWUPP-BIL-ATB
$504.95
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Timber Creek Outdoors GLPKD Greyman Lower Parts Kit AR-Platform Desert
Timber Creek Outdoors
Greyman
GLPKD
$95.99
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Timber Creek Outdoors GLPKBL Greyman Lower Parts Kit AR-Platform Black
Timber Creek Outdoors
Greyman
GLPKBL
$95.99
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Timber Creek Outdoors TCOEKB Enforcer Complete Build Kit Blue Anodized for AR-15
Timber Creek Outdoors
Enforcer
TCOEKB
$599.99
Ships from Warehouse
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