wedge-type breech-block

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wedge-type breech mechanism

vertical wedge-type breech mechanism

vertically-operated wedge-type breech mechanism

horizontal sliding wedge-type breech

wedge (arm locking wedge)

breech block pivoted below the level of the chamber

blow-back breech block

breech-block carrier

breech-block crank

breech-block detent

vertical sliding breech-block system

face of breech block

wedge-type breechblock

cylinder block (engine block)

feed block slide (feed-block-actuating slide)

block-type injection pump

hairpin-type road block

wedge breechblock

wedge formation

side cap; garrison / flight cap (US); wedge cap (Canada); field service cap (UK)

fire team wedge

adjuster wedge recess

breechblock wedge

correction wedge scale

correction wedge shaft

deflecting wedge

deploy into a wedge formation