My bet is the sear spring. I would try that first with the 99 op rod and bolt.
Once you get the wrinkles ironed out the 7.62x39 barrel combo is a ton of fun!
As for the 7.62 barrel I had the exact problem getting mine to run with 7.62 NATO. I don't know who made my barrel (came with the weapon) but I think it is the same as yours, M60? barrel liner in a org. 7.7 barrel? My problem was a headspace. Once again try the 99 op rod and bolt and double check the HS.
Once you get the wrinkles ironed out the 7.62x39 barrel combo is a ton of fun!
As for the 7.62 barrel I had the exact problem getting mine to run with 7.62 NATO. I don't know who made my barrel (came with the weapon) but I think it is the same as yours, M60? barrel liner in a org. 7.7 barrel? My problem was a headspace. Once again try the 99 op rod and bolt and double check the HS.
