Well, I finally started putting together my Bar-10. I got the airsoft gi/planter enterprise parts, not due to cost, but due to the fact that everything else was out of stock. I got the spring(170 spring), the piston, spring guide, and new sears. I know your not suppose to go over the 150spring without the zerotrigger/piston combo, but dad didn't think it would hurt anything, so he ordered 2 of them, considering he is building the same weapon as well. I Tefloned the cylinder head. I also got my dad to some of the parts to work and re-machine them. I got all of the burrs off of the rifle parts so nothing catches. I also cut some out of my cylinder and smoothed it out, like in Noobie's guide. Firing .20's stock, after assembly was 400. After the cutting and modding, it was 450. Now, with the parts installed, it is shooting 600 with .20's. I have .25's and .30's, and it actually shoots the .25's better. I'm going to have to go down a spring size to make it field legal for louisiana though. It defiantly shoots hard enough, just have a few problems. What should I do for accuracy? The rifle itself isn't consistent at all. Would a new hop-up bucking be all I needed? Or should I replace the hop-up completely? Would a tight-bore barrel really help that much? And is there anything else I need to upgrade? Would the Teflon cylinder/damper head be worth it? I'm also having a problem with the bolt pull. Sometimes when i pull the bolt back, and push it back forward, it explodes all my bb's from my magazine into my barrel. Idk if its the mag release button causing it or what, but it makes it skirmishible due to the fact that i can randomly lose my whole mag. Any help would be appreciated, Thanks again.