The AR-10 chambered in 7.62x39mm 🇳🇱🇺🇲🇫🇮
In the late 1950's, Finland wanted to replace their aging M39 Mosin rifles for something more modern and in the Soviet 7.62x39mm intermediate cartrdige. Multiple rifles were submitted to trials
The Madsen LAR, Cetme B, Sig SG-510, M58 (prototype of the later RK-62) and the AR-10, and all of the rifles were rechambered to 7.62x39mm
The AR-10 used for the trials has some notable differences. The rifle presented was the short barreled/carbine variant, it had either 20 round propiertary magazines or 30 round standard AK magazines, it had a side charging handle inside of the carry handle and a flat carry handle.
The M58 was chosen and later changed to RK-60 and finally the RK-62, which is to this day still the standard issue rifle. But in 2022, the Finnish army bought the Sako M23 rifle as the new sniper rifle (modern AR-10 variant)