US12313364 - Safety mechanism for blowback firearm

The patent describes a breechblock assembly for a blowback firearm that includes a lever which can move between a blocking and non-blocking position, preventing the firearm from firing when in the blocking position. A spring biases the lever to ensure safety by keeping it in the blocking position until the breechblock is properly positioned.

Claim 1

1. A breechblock assembly for a firearm, the breechblock assembly comprising: a breechblock extending along a central axis and configured to reciprocate along a receiver of the firearm between a recoil position and a battery position; a lever on the breechblock, the lever movable from a blocking position to a non-blocking position in response to the breechblock moving from the recoil position to the battery position; and a spring arranged to bias the lever to the blocking position; wherein when the lever is in the blocking position the lever prevents the firearm from firing. a breechblock extending along a central axis and configured to reciprocate along a receiver of the firearm between a recoil position and a battery position; a lever on the breechblock, the lever movable from a blocking position to a non-blocking position in response to the breechblock moving from the recoil position to the battery position; and a spring arranged to bias the lever to the blocking position; wherein when the lever is in the blocking position the lever prevents the firearm from firing.

Google Patents

https://patents.google.com/patent/US12313364

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12313364