Like new condition original M53 bolts (Yugo mfg). Judging by the bolt faces these appear to be unused.
Compatible for use with 308 & 8mm
Compatible for use with MG42, M53, MG1, MG3 & Steyr 74
These do not include the anti-bounce stabilizer spring unless checked.
The anti-bounce stabilizer is not a necessary part for proper function and not used in semi auto conversions.