Does anyone have any experiences with MI's bcg's? The only thread I could find on the forum was from around 2013. Last winter at a gun show I picked up a new, still in it's blister pack, MI bcg. I believe it's an earlier bcg, as it has a C158 bolt rather than the 9310 shown currently. Specs are the same as the current ones except for the bolt. The staking on the key looks great. The only product I have from MI is the upper receiver rod, but I know they have good reviews on their other products, just can't seem to find any reviews anywhere online.