The Heckler-Koch MSG90A1 was released in 1987 and is designed after Heckler-Koch’s PSG1 (Präzisionsschützengewehr, German for “precision-shooting rifle”) which was introduced in 1972.
The MSG90A1 is the militarized version of the H&K PSG1.
Caliber: 7.62mm x 51 (.308 WIN)
Weight (Empty): 15.60 lbs.
Barrel Length: 23.62’”
Overall Length: 46.65”
Action and Operation: Semi auto, delayed blowback.
Barrel: Cold-forged, quenched and tempered barrel
Stock: Adjustable Butt stock lengthwise, vertically and cheek-piece
Magazine: 5 or 20-round detachable box magazine.
Effective range: 800 m
The rifle has a free-floating barrel and comes with a detachable flash suppressor and that allows for a screw-on sound suppressor.
The ejection port is on the right side and has a brass deflector that allows the gun to be fired by a left handed shooter without sending hot brass into their face. The brass shoots forward which helps if you are shooting next to someone because it stops the brass from being shot into their face also. The deflector limits the damage to brass casings making the brass easier to reload.
The MSG90A1 is made for the U.S. Department of Defense and used by some of the Hostage Rescue Teams of the FBI.