barrel locking spring

пружина фіксатора ствола

barrel-locking thread

barrel assembly (barrel group)

automatic heavy barrel rifle / heavy barrel automatic rifle

barrel plunger spring

belt feed pawl spring / belt-feed pawl spring

belt feed lever pivot spring / belt-feed lever pivot spring

axle-tree retaining bolt locking pin

automatic locking retractor

wire locking ring

differential gear with self-locking device

insert locking lug

Jug for locking sight to adapter

front-sight locking screw

control surface locking mechanism

ground locking pin

landing gear locking pin

locking cotter pin

head-space adjusting screw locking plug

rear-locking bolt

peep rear sight with locking device

self-locking nut

wedge (arm locking wedge)

axis of the barrel