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Description
Link for Information and Image: modernfirearms.net/en/assault-…

Website: modernfirearms.net/en/

The OTs-12 “Tiss” assault rifle differs from the standard AKS-74U in a number of ways. The most obvious changes were the new barrel with its 9 mm bore, its new muzzle brake/compensator, a modified bolt with enlarged face and a new 20-round magazine made from stamped steel. The least obvious but perhaps most interesting change, however, is its redesigned gas system. Due to the relatively low pressures generated by subsonic 9×39 mm ammunition, the gas port and gas block were moved back, to just in front of the chamber. From there, propellant gases were fed forward to the modified AKS-74U gas block via the steel gas tube running above the barrel, inside the handguard. This permitted the use of an unmodified AKS-74U bolt carrier and gas piston. The final change involved its rear sight, which was replaced with an adjustable aperture (diopter) with a rotating knob located on the left-hand side of the rear sight block. The sight has four range settings, for 50, 100, 150, and 200 meters.

Technical Specifications, OTs-12 assault rifle

Cartridge: 9×39 mm
Overall Length: 730 mm; 490 mm with stock folded
Barrel Length: 200 mm
Weight (with empty magazine): 2.5 kg
Magazine: 20-round detachable box
Rate of Fire: 700 rounds per minute

Description
Link for Information and Image: modernfirearms.net/en/assault-…

Website: modernfirearms.net/en/

The OTs-12 “Tiss” assault rifle differs from the standard AKS-74U in a number of ways. The most obvious changes were the new barrel with its 9 mm bore, its new muzzle brake/compensator, a modified bolt with enlarged face and a new 20-round magazine made from stamped steel. The least obvious but perhaps most interesting change, however, is its redesigned gas system. Due to the relatively low pressures generated by subsonic 9×39 mm ammunition, the gas port and gas block were moved back, to just in front of the chamber. From there, propellant gases were fed forward to the modified AKS-74U gas block via the steel gas tube running above the barrel, inside the handguard. This permitted the use of an unmodified AKS-74U bolt carrier and gas piston. The final change involved its rear sight, which was replaced with an adjustable aperture (diopter) with a rotating knob located on the left-hand side of the rear sight block. The sight has four range settings, for 50, 100, 150, and 200 meters.

Technical Specifications, OTs-12 assault rifle

Cartridge: 9×39 mm
Overall Length: 730 mm; 490 mm with stock folded
Barrel Length: 200 mm
Weight (with empty magazine): 2.5 kg
Magazine: 20-round detachable box
Rate of Fire: 700 rounds per minute