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- n. Plural form of breechblock.
Sorry, no etymologies found.
The 30-30-class blank cartridges were inserted into the firing ports of the breechblocks, and the guns were fully ready.
At some parts of the front that day the thermometer fell to 40 below and the breechblocks of rifles froze solid; oil in the sumps of tanks and trucks had the consistency of tar, and the drag on the dynamos made it impossible to start their engines; battery plates were warped, cylinder blocks were split open, axles refused to turn.
They were unsatisfactory because the breech could not be sealed against escape of the powder gases, and the crude, chambered breechblocks, jammed against the bore with a wedge, often cracked under the shock of firing.
The breechblocks of the guns were opened, clicked shut again, and then came the welcome words: