HK

Action: Semi-Auto - Caliber: 5.56 NATO - Capacity: 30rd - Barrel: 16.5 (1:7) with HK/OSS Compensator - Upper Receiver: Aluminum Black - Lower Receiver: Aluminum Black - Stock: 6-Position MAGPUL CTR Black - Grip: Synthetic Black - Handguard: 14 Modular Rail System Black - Trigger Pull: 7.64 lbs - Length: 33.75 - 37 - Width: 3.07 - Height: 9.45 - Weight: 8.81 lbs. - Keyhole attachment system for accessory rails keeps weight down and provides more natural handguard grip - Ambidextrous safety/selector lever MR rifles can be placed on safe even when uncocked - Precise standard two-stage MR556A1 trigger can be used or easily replaced by accessory trigger mechanism - HK new 30-round polymer magazine. MR556A1 magazine well accepts standard GI mags and most AR/M4/M16 magazines - HK extended latch charging handle makes operation with a scope easier - Special target rifle takedown pins ensure the upper and lower receivers are firmly mated together for the maximum accuracy - Extended magazine release button for fast and easy magazine changes - Barrel that holds its zero moderately swagged cold hammer forged 16.5 barrel has a slightly smaller internal diameter at the muzzle end than the chamber end. This feature has a positive effect on bullet accuracy and velocity