жолоб
four-groove barrel
barrel assembly (barrel group)
automatic heavy barrel rifle / heavy barrel automatic rifle
slot-type groove
spiral parallel groove
breechblock-stop groove
cam groove
circular groove (of ammunition)
crimping groove
dismounting groove
vertical oil groove
extraction groove
extractor groove
finger groove
groove for coupling
groove
axis of the barrel
barrel
barrel bomb
barrel bore wear level
barrel extension
barrel latch
barrel life
barrel link
barrel lock lever
barrel weight
hand-held under-barrel grenade launcher
length of barrel
open barrel sight
quick-change barrel
rear of the barrel
reinforced barrel