Bear Creek Arsenal BC-15 5.56 NATO 7.5in Bolt Action Style Upper Receiver, M4 Barrel, 1-7 Twist, 1/2X28, Flash Hider, Parkerized, UABA-302-556PM47.517-7ASR

Bear Creek Arsenal BC-15 5.56 NATO 16in Upper Receiver, M4 Barrel, Mid-Length, 1-7 Twist, 1/2X28, Flash Hider, Parkerized, UAFC-4020-556MM41617-15TNGSR

Bear Creek Arsenal BC-15 5.56 NATO 16in Upper Receiver, M4 Barrel, Carbine Length, 1-7 Twist, 1/2X28, Flash Hider, Parkerized, ODG, UAFC-4015-556CM41617-15ODGSR

Bear Creek Arsenal BC-15 5.56 NATO 16in Bolt Action Style Upper Receiver, M4 Barrel, 1-8 Twist, 1/2X28, Flash Hider, 416R, UABA-321-556CM41618SS-15ASR

Bear Creek Arsenal BC-15 5.56 NATO 10.5in Bolt Action Style Upper Receiver, M4, 1-8, 1/2X28, Flash Hider, 416R, UABA372556CM410518SS10ASR

Bear Creek Arsenal BC-15 5.56 NATO 16in Right Side Upper Receiver, M4, Mid-Length, 1-7, 1/2X28, Flash Hider, Black Nitride, Tungsten, UASCC5000556MM41617M15TNGSR

Bear Creek Arsenal BC-15 5.56 NATO 16in Bolt Action Style Upper Receiver, M4 Barrel, 1-7 Twist, 1/2X28, Flash Hider, Cold Hammer Forged, UABA-325-556CM41617MHF-15ASR

Bear Creek Arsenal BC-15 5.56 NATO 16in Upper Receiver, M4 Barrel, Mid-Length, 1-7 Twist, 1/2X28, Flash Hider, Parkerized, FDE, UAFC-4019-556MM41617-15FDESR

Bear Creek Arsenal BC-15 7.62x39 16in Bolt Action Style Upper Receiver, Heavy Barrel, 1-10 Twist, 5/8X24, Flash Hider, Parkerized, UABA-305-762CHB16110-15ASR

Bear Creek Arsenal BC-15 .223 Wylde 20in Bolt Action Style Upper Receiver, Straight Fluted Heavy, 1-8, 1/2X28, Flash Hider, 416R, Black, UABA352223WRHB2018FSS15ASR

Bear Creek Arsenal BC-15 5.56 NATO 20in Bolt Action Style Upper Receiver, Government Profile, 1-8, 1/2X28, Flash Hider, Black Nitride Cold Hammer Forged, UABA323556RGVNT2018MHF15ASR

Bear Creek Arsenal BC-15 7.62x39 16in Bolt Action Style Upper Receiver, Heavy, 1-10, 5/8X24, Flash Hider, 416R, UABA355762CHB16110SS15ASR

Bear Creek Arsenal BC-15 .223 Wylde 16in Bolt Action Style Upper Receiver, M4, 1-8, 1/2X28, Flash Hider, 416R, UABA-331-223WCM41618SS-15ASR

Bear Creek Arsenal BC-15 7.62x39 18in Bolt Action Style Upper Receiver, Heavy Barrel, 1-10 Twist, 5/8X24, Flash Hider, Parkerized, UABA-335-762MHB18110-15ASR

Bear Creek Arsenal BC15 7.62x39 16in Bolt Action Style Upper Receiver, Heavy, 1-10, 5/8X24, Flash Hide, Nitride, UABA344762CHB16110SSBCF15ASR

Bear Creek Arsenal BC-15 .223 Wylde 20in Bolt Action Style Upper Receiver, Heavy, 1-8, 1/2X28, Flash Hider, 416R, Black, UABA-373-223WRHB2018SS-15ASR

Bear Creek Arsenal BC-15 5.56 NATO 20in Bolt Action Style Upper Receiver, Heavy Barrel, 1-7 Twist, 1/2X28, Flash Hider, Black Nitride, UABA-399-556RHB2017M-15ASR

Bear Creek Arsenal BC-15 5.56 NATO 16in Upper Receiver, M4, Mid-Length, 1-7, 1/2X28, Flash Hider, Black Nitride, FDE, UAFC4001556MM41617M15FDESR

Bear Creek Arsenal BC-15 12.7x42 10.5in Bolt Action Style Upper Receiver, Heavy, 1-20, 1/2X28, Flash Hider, Parkerized, UABA359127PHB10512093610ASR

Bear Creek Arsenal BC-15 6.5 Grendel 22in Bolt Action Style Upper Receiver, Heavy Barrel, 1-8 Twist, 5/8X24, Flash Hider, Parkerized, UABA-3100-6.5RHB2218-15ASR

Bear Creek Arsenal BC-10 .308 Winchester 22in Bolt Action Style Upper Receiver, Lightweight, 1-10, 5/8X24, Flash Hider, Black Nitride, UABA-391-308RLW22110M-15ASR

Bear Creek Arsenal BC-15 .458 SOCOM 16in Bolt Action Style Upper Receiver, Heavy, 1-14, 5/8X32, Flash Hider, Parkerized, UABA350458CHB1611487515ASR

Bear Creek Arsenal BC-15 6mm ARC 20in Bolt Action Style Upper Receiver, Straight Fluted Heavy, 1-8, 5/8X24, Flash Hider, 416R, UABA3336MMARHB2018SSF15ASR

Bear Creek Arsenal BC-15 .450 Bushmaster 18in Upper Receiver, Heavy, Mid, 1-24 Twist, 5/8X32, Flash Hider, Parkerized, Tungsten, UAFC4014450MHB1812415TNGSR

Bear Creek Arsenal BC-15 .350 Legend 18in Bolt Action Style Upper Receiver, Heavy, 1-16, 5/8X24, Flash Hider, 416R, UABA370350LCHB18116SS15ASR

Bear Creek Arsenal BC-10 .308 Winchester 20in Bolt Action Style Upper Receiver, Heavy, 1-10, 5/8X24, Flash Hider, 416R, UABA353308RHB20110SSBCF15ASR

Bear Creek Arsenal BC-15 .450 Bushmaster 18in Upper Receiver, Heavy, Mid, 1-24 Twist, 5/8X32, Flash Hider, Parkerized, ODG, UAFC4012450MHB1812415ODGSR

Bear Creek Arsenal BC-15 .223 Wylde 18in Bolt Action Style Upper Receiver, Straight Fluted Heavy, 1-8, 5/16X24, Flash Hider, 416R, UABA394223WMHB1818FSS15ASR

Bear Creek Arsenal BC-15 6mm ARC 24in Bolt Action Style Upper Receiver, Straight Fluted Heavy, 1-8, 5/8X24, Flash Hider, 416R, UABA3756MMARHB2418SSF15ASR

Bear Creek Arsenal BC-15 .300 Blackout 8.5in Bolt Action Style Upper Receiver, Heavy Barrel, 1-8 Twist, 5/8X24, Flash Hider, Parkerized, UABA-349-300PHB8.518-7ASR

Bear Creek Arsenal BC15 .350 Legend 16in Bolt Action Style Upper Receiver, Heavy, 1-16, 5/8X24, Flash Hide, Nitride, UABA382350LCHB16116SSBCF15ASR

Bear Creek Arsenal BC15 12.7x42 18in Upper Receiver, Heavy, Mid-Length, 1-20, 49/64X20, Flash Hide, Parkerized, FDE, UAFC4031127X42MHB1812015FDESR

Bear Creek Arsenal BC-15 6mm ARC 18in Bolt Action Style Upper Receiver, Heavy Barrel, 1-8 Twist, 5/8X24, Flash Hider, Parkerized, UABA-369-6MMAMHB1818-15ASR

Bear Creek Arsenal BC-10 8.6 Blackout 16in Bolt Action Style Upper Receiver, SOCOM Barrel, 1-3 Twist, M18x1.5, Flash Hider, Parkerized, UABA-361-8.6CSC1613-15ASR

Bear Creek Arsenal BC-15 6mm ARC 18in Upper Receiver, Heavy, Mid-Length, 1-8, 5/8X24, Flash Hider, Parkerized, FDE, UAFC40346MMAMHB181815FDESR