Germany adopts G28 DMR rifle

[Don Quijote]

No direct impingement rifle was going to go trough standard Warsaw Pact rifle trials (for example for shooting with muzzle clogged with sand) and be enough soldier proof for soviet conscripts.

RIght. Because youtube isn't full of people beating the ever living shit out of all kinds of grades of ARs including filling them with sand/mud/crap and then shooting magazine after magazine.

I also don't believe you when you say there is a rifle that can be fired with a clogged barrel and not destroy itself from overpressure.