I've heard something about certain aftermarket shocker bolts that are for "open body" or "closed body" shockers. Mines the '05 and with the bolt assembly and firing chamber removed there are two holes in the sides of the marker. Anyways, i'm looking for a new bolt to increase the efficiency. Looking at the evolve bolt
so, looking at the shocker animation, it seems the only thing the HE bolt has over the stock bolt is one more o-ring farter down the bolt? $100 for one more o-ring? that seems rediculous. think i could just get a machinist to mill a new o-ring groove in the stock bolt and get the exact same effect?