7.62x39 CO2 Cannon
These are a bit better than upgraded stock rockers.Any reason you went with TSP rockers instead of just doing the trunnion upgrade on the stockers? I've heard of the stock trunnions puking needle bearings but the BTR/Comp upgrade seems to do the trick, and it's cheap.
They're stronger, roller tip, don't prematurely wear out, etc.
Check this whole thread out: