just barely got an auto cocker , YAHOO! (so no upgrades yet)
rps, diablo, anything that yo find works good through your gun.
first of all it looks very very good, has a larger bore front end, smaller tighter bore back end (very nice),can have diffrent interchangable tips (10,12,14,16 inch and many colors)stainless steel back is nice and has strong threads and the aluminum front is nice because of the weight reduction. the price is very very GOOD!
Nuthin i can think of especially for the price. you will see an awesome improvement over your stock barrell
into looks, performance, and a higher end barrel get this! the boomstick is not worth the extra forty! dont think twice!