Design
The breech uses a vertically-sliding breechblock for loading the fixed cartridge cases. The gun recoils approximately 29 cm (in most applications), automatically opening the breech and ejecting the empty cartridge case as the gun returns to battery from full recoil. The barrel of the L7 is fitted with a bore evacuator approximately halfway down its length. It is eccentrically mounted, which is a key recognition feature.
Read more about this topic: Royal Ordnance L7
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