[ctman]

What's the diameter for the brass barrel that comes with the tm precision hop up unit?

I do believe it's a 6.05. Correct me if I'm wrong somebody?

 

[ctman]

It still Needs a Tightbore in it, Get at 6.03 or 6.01. I've had both Laylax and PDI, and they both are great, Just get somthing based on your budget.