Upper Receiver
Find the exact complete or stripped AR-15 upper receiver for your next build. We stock forged and billet uppers, cold hammer-forged barrels, low-profile gas blocks, and advanced bolt carrier groups (BCGs) engineered for extreme reliability and sub-MOA accuracy.
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Out of stockOn Sale
Knights Armament - SR-25 PC Upper Receiver M-LOK - 16" - 111474
Knights Armament Company
Now: $4,114.69Was: $4,331.25The Knights Armament SR-25 Precision Carbine Upper Kit was built as a dual role 7.62 NATO Carbine. Every PC is equally adept at putting rounds on target at 1000 meters or raNow: $4,114.69Was: $4,331.25 -
Out of stockOn Sale
Knights Armament - SR-25 7.62 E2 M-LOK Upper Receiver - 14.5" - #111468
Knights Armament Company
Now: $4,114.69Was: $4,331.25The Knights Armament SR-25 14.5” Combat Carbine Upper kit is the latest evolution in the lightweight 7.62mm NATO Carbine platform. The 14.5” CC provides 7.62mm NATO performance in a package of...Now: $4,114.69Was: $4,331.25 -
Out of stockOn Sale
Knights Armament - Upper Receiver Kit SR-30 MOD 2 - 9.5" - 32310
Knights Armament Company
Now: $2,311.47Was: $2,433.12Knight's SR-30 E3 MOD 2 takes advantage of the .300 BLK, offering a 9.5" barrel for a significantly more transportable and maneuverable firearm. The QDC compatible Flash Hider will mount any of the...Now: $2,311.47Was: $2,433.12 -
Out of stockOn Sale
Knights Armament - Upper Receiver SR-15 MOD 2 URX 4 M-LOK 5.56 mm NATO 18" - 32309
Knights Armament Company
Now: $2,311.47Was: $2,433.12The SR-15 E3 Mod 2 5.56 mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX4 M-LOK handguard. An improved E3 round-lug boltNow: $2,311.47Was: $2,433.12 -
Knight Armament - 5.56 QDC 3-Prong Flash Suppressor Kit - 1/2"-28 TPI - 30555
Knights Armament Company
$129.96The Knight's Armament 5.56mm QDC 3-Prong Flash Suppressor Kit (KAC PN: 30555) is KAC's signature 3-prong flash eliminator for 5.56mm rifles with 1/2"-28 TPI muzzle threading. The KAC 3-Prong Flash...$129.96 -
Out of stockOn Sale
Knights Armament - SR-15 Carbine Mod2 Complete Upper - 14.5 E3 Mod 2 - #31949
Knights Armament Company
Now: $2,088.62Was: $2,198.54The SR-15 E3 MOD 2 series’ 5.56mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX4 M-LOK handguard. An improved E3 round-lug bolt design both enhances...Now: $2,088.62Was: $2,198.54 -
Out of stockOn Sale
LMT Defense M203 Quadrant sight, Rail Mounted
LMT Defense
Now: $387.90Was: $444.15LMT Defense Quadrant sight, mounts to a 1913 picatinny rail upper receiver.Now: $387.90Was: $444.15 -
Out of stockOn Sale
LMT Defense - M203 Leaf Sight Handguard Mounted - 8448330
LMT Defense
Now: $175.50Was: $180.90Leaf Sight for Standard M203 Grenade Launcher. Mounts directly to the standard handguard.Now: $175.50Was: $180.90 -
Out of stock
LMT Defense - Full-Auto 5.56 Bolt Carrier - L7D3A
LMT Defense
$224.55The Lewis Machine and Tool AR-15 bolt carrier is a full auto rated, M16 cut carrier designed for long term durability and reliability. The manganese phosphate carrier is machined out of 8620...$224.55 -
Out of stock
LMT Defense - Semi-Auto 5.56 Bolt Carrier - L7A3A
LMT Defense
$119.70Standard semi auto carrier assembly - carrier only. Does not include the firing pin, cam pin, or firing pin retaining pin. As with all LMT bolts/carriers these are test fired at the factory and will...$119.70 -
Out of stockOn Sale
LMT Defense - .308 Semi-Auto Bolt Carrier Group - #LM308D
LMT Defense
Now: $558.00Was: $575.10The LMT Defense .308 BCG was designed with the same materials and principles as the 5.56 Enhanced Bolt Carrier Group. This bolt carrier group is exceptionally durable, and it’s no mystery why the...Now: $558.00Was: $575.10 -
Out of stock
LMT Defense - Full-Auto Piston 5.56 Bolt Carrier G2 - #R-L7Q3APE
LMT Defense
MSRP: $282.00$261.45Full auto piston bolt carrier. Developed for the Estonia Defense Forces, the new and improved design features a captive firing pin retainer similar to our .308 rifles. Drop in upgrade for all...MSRP: $282.00$261.45