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 is a selective fire battle rifle designed by Schweizerische Industrie Gesellschaft (now SAN Swiss Arms) of Switzerland. It uses a roller-delayed blowback system similar to the H&K G3 and CETME rifles. The AM 55 entered servic ...

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

References

* http://www.forgottenweapons.com/rifles/swiss-ak-52/ * https://www.youtube.com/watch?v=-ykmqUFJWAw * Battle rifles Rifles of Switzerland Trial and research firearms SIG Sauer rifles {{Rifle-stub