Diagram of early production Veresk 9×21mm SMG. It lacks the folding foregrip of the later production version.
2mon 21d ago by lemmy.world/u/setsneedtofeed in forgottenweapons
Developed by the Central Scientific-Research Institute of Precise Mechanical Engineering under request of FSB, the SR-2 has been in service since 1999.
Mechanically, the SR-2 is gas operated, and its action is based on a scaled-down version of the SR-3 Vikhr compact assault rifle. The SR-2 uses long stroke gas piston, located above the barrel, the rotating bolt has multiple locking lugs.
The 9x21mm round was developed for the SR-1 to be a compact, armor-piercing round similar in concept to western PDW calibers like 5.7mm and 4.6mm. The round is designed to be effective against unarmored targets by way of its construction, with a steel penetrator core surrounded by a polyethylene sleeve. When striking a soft target, the round is supposed to stay together, creating a larger wound cavity.
The SR-2 has been superceeded by SR-2M which has a redsigned handguard with a forward protective handstop, and the SR-2MP which has picatinny rails and a suppressor capability.
A version of the SR-2MP has been seen with an alternative stock option for use with faceshielded helmets.
