виступ цівки
clearance between barrel and forearm
forearm
forearm cartridge block
forearm of stock
forearm with gas tube assembly
cocking stud
cradle-trunnion stud
feed-pawl stud
cylinder retention stud
advance stud
axle shaft stud
ball stud nut
belt feed lever stud
belt-feed lever pivot stud
clutch yoke ball stud
control lever stud nut
cylinder head stud nut
hub stud
front guard screw stud