Bought myself a 7.62x25mm barrel to fit a 22mm trunion. I plan to have it turned down a bit to accept a rear sight block as well. I'm leaning in one of two ways as what to do next. Either:
A. put a gas block in the usual place and build a pump action Ak in 7.62x25mm. This has it's advantages in that it would be pretty easy for me to do, wouldn't require any permanent alteration to the barrel or welding of the bolt, front trunion etc... And that it will cycle any loads, including those neat subsonics loaded with 150gr bullets in the x25mm case. If I want to make it semi auto later on, it should still be possible.
B. Make it gas operated with a short gas system. I don't want to do blowback because of the amount of welding needed, and it's irreversible. I would want the gas block at about the same place as a krinkov. Ideally I would like to use regular length handguards, so maybe just slightly longer than a krink, though I would run into problems with the HG retainer. I think with a short gas system, shortened recoil spring, and maybe a bit of weight shaved off the carrier, I could get it to work. The only irreversible part is the carrier.
So which sounds like a better idea? I'd rather have a semi auto, but I'm concerned it won't work. I've studdied the gas op-7.62x25mm Ak PBB built, and I'm hoping by taping the gas closer to the chamber with the same dia gas port, and a shorter lighter piston, that I can get away with removing less weight from the carrier. My only hesitation is removing that hump from the very back of the carrier, since it keeps the hammer from striking the carrier before its fully in battery... I want to keep that intact.