best way to cut a inner barrel.
 

as the title says i'm looking to cut the length of my inner barrel down a few CM whats the best way to do that??

with a tubing cutter. They won't leave a bur on the end. Hacksaws are for Hacks.
you can by them at cambodian tire for like 29.99

Unfortunately most tubing cutters will turn a burr on the inside of the barrel. You'll have to deburr it with an xacto knife or countersink.

There's the best way and then the cheapest way. Best way is with a metal lathe, but I assume you don't have one.

So, you can do what I did last year when cutting a 330mm barrel for my MP5SD, use a hacksaw and cut as straight a line as you can. Then put the other end of the barrel into an electric drill, and use a good cutting file to square the end, as well as round off the sharp edges. After that you can use a reamer (surprisingly the can opener on Swiss Army knives does well for this), countersinking bit, etc. to crown the inside edge (while still using the drill to spin it). Finish off the crown with fine and finer grit wet/dry sandpaper wrapped around a pencil.

Poor man's............ oops, sorry, more appropriately, the airsofter's metal lathe! :D

really? I have only cut 2 barrels with mine and never an issue, not saying it is impossible. I actually think you would get a burr in the inside just due to the way tubing cutters cut. Makes sense though my handle bars always get a burr on the inside when i cut a set.

Really depends on how much pressure the screw is set for when doing it. A bit of pressure, gradually produces the least amount of inside burr (easily cleaned up with an Xacto knife like Max said), but some people put too much cut per turn of the cutter, in some cases can reduce the inner diamter of the tube (copper pipe or brass barrel) by 0.5mm or more at the end.

Stuff some paper towel down the barrel from the muzzle end past the point you want to cut. Make your mark and cut it with the cutting disk on a Dremel. Then take a cone bit and clean up the burrs on the barrel. Push out the wadding the same way it went in.

Easy and quick and no metal shavings down the barrel.

if it is brass you can cut it with a compound miter saw, then use a couter sink bit to get the nice 45 on the inside.

One would require a compound miter saw in that case. Lol

Ya, I outlined the easiest way using the most common and basic tools most homes have.

i may do a mix of jayhad's and max's idea, i got a pipe cutter bootin around and a Dremel with a cone bit.

That's what I've always done. Clipped over haf a dozen barrels that way, never had an issue.

Use a dull butter knife

Probably won't work well.
-VM

Yay for dremels!

What about karate chopping?