Airtech Studios Advanced Inner Barrel Locking Ring & Advanced R-HOP Arm - AK47/RK74 Mat Type_Smith & Wesson featuring an 8mm bearing gearbox

featuring an 8mm bearing gearbox

the backstrap is interchangeable so that the grip can be customized for hands of any size

tactical sling mount where the buffer tube meets the lower receiver and a removable tactical foregrip

In SEMI Mode

Airtech Studios Advanced Inner Barrel Locking Ring & Advanced R-HOP Arm - AK47/RK74 Mat Type_Smith & Wesson featuring an 8mm bearing gearboxAdvanced Inner Barrel Locking Ring The Advanced locking ring is designed to replace the current O ring (Normally brass) ring at the end of setting up the hop unit, however, with the original, there is a tendency for a wobbly gap in between the components which would tilt the barrel at an angle. Once the new O ring is installed, it will ensure a snug fit to restrict the motion of the barrel that is inside the hop up chamber. It will secure the inner