Cactus Jack Arizona
Member
All things being equal (7.62x39, acceptance of high cap mags, etc.) why are some AK receivers bigger, or more beefier, than others?
Standard AK receivers are of 1.0mm thick steel.bobotech said:In a nutshell, RPK and Yugo receivers are 1.6mm compared to the standard 1.5mm and they also have the wide bulged front trunnion. They are designed for heavier duty use.
The RPK uses 1.6mm steel in it's receiver.briansmithwins said:Standard AK receivers are 1mm, not 1.5. The RPK uses the thicker 1.5mm sheet steel.
I still see personal accounts of chinese aks lasting over 40,000 rounds on multiple forums. They might be questionably lower carbon steel, butStandard AK receivers are of 1.0mm thick steel.
The Chinese used 1.5mm steel in their receivers because they used a crap grade of steel and the thickness was a compensation method.
The RPK uses 1.6mm steel in it's receiver.
AFAIK, only the Chinese used 1.5mm receivers.