HM Defense 12-5MBUP-556, Upper, Fits AR-15, 223REM/556NATO, 12.5″ MONOBLOC Barrel, Midlength Gas System with Integral Gas Block, 1:8 Twist, Muzzle Brake, Black Color, Anodized Finish, 10 3/8″ Free Float Rail with M-LOK 12-5MBUP-556
| Weight | 4.5 lbs |
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| Dimensions | 27.25 × 3.5 × 3 in |
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| Barrel Length | 1 |
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