All upper receivers fit on ANY Mil Spec lower receiver
16" 10mm Upper Receiver$721.50 MSRP Complete upper receiver assembly manufactured for 10mm and includes one 18 round polymer magazine.
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16" K16 Upper Receiver$533.00 MSRP Available in 5.56 NATO, 6.8 SPC and 7.62x39mm
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16" 7.62 x 39mm Upper Receiver$588.90 MSRP Complete upper receiver assembly manufactured for 7.62 x 39mm and includes one magazine.
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11.5" K3B-CAR Upper Receiver$598.00 MSRP This K3B variant has an 11.5" barrel with a permanently attached 5.5" flash suppressor. Available in 5.56 NATO
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16" K3B-FAR Upper Receiver$559.00 MSRP This model features a Featherweight (FAR) barrel which lightens the weight significantly without compromising accuracy or quality. Available in 5.56 NATO
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16" M4 Tactical Carbine Upper Receiver$796.90 MSRP Sometimes called the "alphabet gun". The A3-TC variant takes the K3B-M4 and adds a detachable carry handle and FIRSH quad rail free floating handguard. Available in 5.56 NATO
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16" K3B-M4 Upper Receiver$588.90 MSRP Features an M4 contoured barrel and M4 handguards. Available in 5.56 NATO
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16" K3B Upper Receiver$526.50 MSRP Available in 5.56 NATO
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16" 40 S&W Upper Receiver$721.50 MSRP Complete upper receiver assembly manufactured for 40 S&W; and includes one 20 round polymer magazine.
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16" 45 ACP Upper Receiver$721.50 MSRP Complete upper receiver assembly manufactured for 45 ACP and includes one 18 round polymer magazine.
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20" K4B Upper Receiver$572.00 MSRP Available in 5.56 NATO or 6.8 SPC
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20" Ultramatch Top End Assembly$783.90 MSRP Top end assembly with a 20" bull Ultramatch barrel, .223 Remington, flat top upper, free floating aluminum handguard and rail gas block.
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16" 6.8 SPC Upper Receiver$637.00 MSRP Complete upper receiver assembly manufactured for 6.8 Remington/SPC and includes one magazine.
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16" K74 Upper Receiver$608.40 MSRP 16" carbine in 5.45x39mm
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24" WSSM/OSSM Upper Receiver$895.70 MSRP Upper conversion unit for your complete AR-15 lower receiver designed for the Winchester Super Short Magnum and Olympic Super Short Magnum
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20" K8UR Targetmatch Upper Receiver$560.30 MSRP Top end assembly with a 20" bull Targetmatch barrel. Available in 5.56 NATO and 6.8 SPC
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16" 9mm Upper Receiver$721.50 MSRP Complete upper receiver assembly manufactured for 9mm and includes one 30 round polymer magazine.
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16" LTF Upper Receiver$743.60 MSRP The LTF model has fluting along the full length of the barrel increasing heat dissipation. Other options are also included standard. Available in 5.56 NATO
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16" LT M4 Upper Receiver$696.80 MSRP The LT model has a M4 style barrel. Other options are also included standard. Available in 5.56 NATO
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