Opsgear UMP shrou, mag, front and rear sights, g36 folding stock
JCS red hot power tube
I LOVE this barrel, by far my favorite. Even though it is so small (i have the 6 inch version of this barrel)it is majorly accurate. The shot grouping on this barrel is AWSOME, from 50 feet i fire 5 shots, 3 were right on top of each other, the other two where just barely off to the side. then from 100 feet the grouping was, with 5 shots, they were all within at the most and inch from each other.
This barrel is like glass on the inside it is very smooth, thus causeing less friction to the paintball letting it fly a tad bit farther.
Wow, simply wow, this barrel is an 11 (remember i have the 6 incher) but since this only goes to 10 that will have to do.