Just the standard velocity screw, unless you count the RVA on a spyder
Tippy a5 w/ proto one piece barrel, 20 oz co2
Saves on air.
Still need allen wrench.
Screw comes undone.
Dont believe the hype, you STILL need an allen wrench to lock the screw in. If you don't use it, it will just come back out, and turn your velocity down. Also, the whole thing rotates whether tightened or not, and sticks out too far. it may save a little on air, but why buy it for 20 bucks if you still have to bring the tools?
the guy who runs the PB shop i go to said to ditch this thing. He's had tons of people return them after trying them. A tippmann's not a spyder, so don't waste 20 bucks! Save up for something really useful like a barrel or egrip