The HK MR556A1 reviewed by the Military Arms Channel.
HK MR556A1 Specs:
- Caliber: 5.56
- Length: 37.68 in (stock extended), 33.90 in (stock retracted)
- Width: 3.07 in
- Height: 9.45 in
- Barrel Length: 16.5 in
- Weight: 8.91 (Rifle + empty 10 round magazine)
- Magazine Capacity: 10 or 20 rounds
- Trigger Pull: 7.64 lb
- Barrel Profile: 6 lands & grooves, right twist, 1 in 7 in
- Sight Radius: 14.60 in
- Sights: Various mechanical or optical sights