When an AK is manufactured in semi-auto only, the little lug on the bolt carrier that trips any full-auto lever is machined off. Plus, the hammer on a semi-auto only AK is machined not to allow that little trip lever to fit under the front of it; not to mention the fact that the receiver does not have the extra hole required for that trip lever to be installed.
I've rebuilt a number of AK's recently and nowhere did I ever hear of the need to change the bolt carrier. Ive used all 922 compliant parts (Nodak Spud receivers) and fire control group but kept the original bolt carrier.
Is this a problem?