Finish out a custom AR-15 build, or customize an existing AR-15 with these parts used on an upper receiver. Improve a rifle’s accuracy with a free float handguard or improved barrel, or improve an AR-15’s handling with an adjustable gas block, ambidextrous charging handle, or improved muzzle device. Or even swap out to a different caliber with a complete upper receiver! The customizations are endless with the AR-15, the most popular rifle in America.
Showing 1–16 of 289 results
BCGs & Parts (17)
Charging Handles (8)
Complete Upper Receivers (52)
Gas Blocks & Gas Tubes (30)
Muzzle Devices (30)
Replacement Upper Parts (9)
Upper Receivers (5)
Odin Works .223 Wylde Barrel 18″, DMR Rifle Gas with Adjustable Gas Block
A 1 MOA guarantee AR-15 barrel with adjustable gas block.
Odin Works 6.5mm Grendel Barrel 20″ & Tunable Gas Block/BCG with DMR Rifle Length Gas
Match grade 1MOA guarantee 6.5 Grendel barrel, with gas block, and BCG.
CMMG, Inc Rifle Length Gas Tube With Roll Pin
This high quality stainless steel AR-15 gas tube kit from CMMG includes a rifle length gas tube and a gas tube roll pin. Don’t skimp on quality when it comes to such a vital part of your rifle’s operating system, CMMG is known throughout the firearms industry as a premier manufacturer of AR-15 rifles and…
Odin Works Billet Upper Receiver, no Forward Assist
A lightweight AR-15 stripped upper receiver without a forward assist.
Odin Works Complete AR-15 Upper, 6.5mm Grendel, 15.50″ K-Mod, 18″ Barrel
A 1MOA guarantee complete 6.5mm Grendel AR-15 Upper Receiver.
Odin Works Complete Upper, .223 Caliber, 12.50″ M-Lok, 16″ Barrel, Adjustable Gas Block
A 1MOA guarantee complete .223 AR-15 Upper Receiver.
Troy Industries AR-15 Tomahawk Ultracompact Stock with BCG
An ultracompact AR-15 collapsable stock, including the BCG.
Leapers Inc. UTG Covert Op Metal Vertical Foregrip with QD Lever Mount
A durable metal foregrip for carbine rifles with a quick detach lever.
Troy Industries M7A1 Ultracompact AR-15 PDW Stock Kit
Reduce the overall length of your AR-15 with this ultracompact stock.
FN AR-15 Hammer Forged Barrel 18″, 5.56mm, Rifle Gas System
A deadly accurate AR-15 barrel from FN.
CMMG .22lr AR-15 Conversion Kit Bravo, 10 Round Magazine
Fire .22lr out of a standard AR-15, great way to save on ammo for training.