[CJay]

bud this is a very common problem with the black python line barrels - worked on literally buckets of the things and the only thing I've found that fits it is the standard King Arms Hop chamber that u get with the king arms metal body kits. I even had this problem on a few P90's I've worked on and that hop unit is entirely different so don't feel bad - only way to get it to work is to persevere - i personally apply a small amount of teflon grease to the outside of the rubber and u can usualy work it on - slow going but only way so far :S