The SIG AK53 was an experimental battle rifle from Switzerland that was designed in the early 1950s.

Operation

The AK53 used the gas-operated principle of operation with the barrel moving forward to operate the cycle. Because a piston is used to move the barrel, this action does not fall under the blow-forward concept. The AK53 was developed during the late 1940s and early 1950s but was rejected. However, it did lead to the

SIG SG 510 The Sturmgewehr 57 (Stgw. 57 ) is a selective fire battle rifle designed by Schweizerische Industrie Gesellschaft (now Swiss Arms, SAN Swiss Arms) of Switzerland. The Stgw. 57 assault rifle uses a Blowback (arms)#Roller-delayed, roller-delayed bl ...

battle rifle, which was in use for over thirty years.

References

* * * Battle rifles Rifles of Switzerland Trial and research firearms SIG Sauer rifles {{Rifle-stub