Originally Posted by
nickdrak
Im having a hard time picturing exactly what you are trying to describe is happening. I am curious which portion of the carrier the bolt catch is locking back on. Pics would be helpful.
From what I can gather, it sounds like your "Thunderbolt" might be a Full Auto carrier and the Bushmaster carrier you tried is a Semi Auto carrier? Possibly the heavier weight of the Full Auto carrier, in-conjunction with the H2 buffer and your ammo combo is "short-stroking" the carrier just enough to make the bolt catch to snag on the leading face of the bottom of the carrier instead of on the bolts face???
Maybe try running an "H" buffer instead of the "H2" and see what happens.