поршневий затвор
breechblock latch / breechblock operating latch
eccentric screw breechblock
eccentric-screw breechblock
breechblock
breechblock buffer
wedge breechblock
breechblock release
breechblock carrier
breechblock head
breechblock stop lever
breechblock wedge
breechblock-stop groove
wedge-type breechblock
hinged breechblock mechanism
horizontal sliding wedge breechblock
breech screw
cap retaining pin screw
bipod body wing screw
deflector clamp screw
lever damp screw
Venturi lock screw
elevating screw joint pin nut
elevating screw knob
elevating screw mechanism
elevating screw tube
lower elevating screw
rear-sight elevating screw knob
screw elevating mechanism
adjustable screw wrench
automatic cocking lever plunger spring screw
barrel-catch screw
bellcrank stop screw