Home Forums Hunting & Shooting AR and Tactical Rifles M70 AK Help

AK guys, got one for ya. Have a Century M70 underfolder that is currently a single shot. It fires, extracts and ejects fine, but stops about a half a centimeter short of returning fully into battery when chambering the next round. I've taken it to one smith who "dug at some carbon buildup in the gas system with a dental pick" which didn't do anything. I hit the gas system with brake cleaner, which appears to make its way through the gas port into the barrel, discrediting that smith's idea that an occluded gas system could be the issue- further, there is no issue with extraction or ejection, so it doesn't seem that being undergassed is the culprit. It does this with three different brand new mags and at least two kinds of ammo.


Where the bolt stops:



Top down view of receiver, in case anyone can find something I missed:



Could it be that I just need a new recoil spring? Not seeing any obvious burrs or anything out of the ordinary on the receiver. Any input is big time appreciated- thanks in advance!