HM Defense Upper 16" AR-15 Gas Block 10 3/8" M-LOK

16MBUP-556, Upper, Fits AR-15, 223REM/556NATO, 16" MONOBLOC Barrel, Midlength Gas System with Inegral Gas Block, 1:8 Twist, Muzzle Brake, Black Color, Anodized Finish, 10 3/8" Free Float Rail with M-LOK
HM Defense's mission is to advance AR15 / AR10 rifle technology to its highest level. They strive to create rifles that are more accurate, easier to maintain and dependable in extreme conditions.

Specifications:

• Patented HM MONOBLOC Barrel with integrally machined Gas Block
• Free-float rail with Picatinny and M-Lok
• Patented HMB Bolt which replaces cam pin hole with cam pin socket and tapered cam pin