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SgtHorvak
05-15-2018, 12:12 PM
Good morning to all!! I'm slowly moving towards starting my first CETME C build, and as a rank beginner I have what may seem to be a dumb question (the first of many, probably!! :rolleyes-new:). As I start pressing the barrel into the trunnion, if, God forbid, I find that I've pressed it in too deep, do I a) keep pressing it the same direction, right on through the trunnion, or b) press it back out the direction that it came from? Thanks for your expertise!!

holescreek
05-15-2018, 01:33 PM
Getting it right the first time is ideal, maximum interference between the barrel and trunnion. If you miss the target you'll want to press it through and try again. Typically you only get one second chance before the barrel diameter is so reduced that it moves too freely in the trunnion. At that point you can knurl the barrel to raise the diameter and try one more time but it will never be as tight as the first time.

You can stop and measure as many times as you want while pressing the first time. Don't rush it and don't panic and start over if you miss your "ideal" number as long as your gap is in tolerance. A tight press at .006" is better than a loose barrel at .020". You can always grow the gap with larger rollers later. Check your roller sizes before hand too, I've had mismatched diameters in demilled kits before.

SgtHorvak
05-15-2018, 01:53 PM
Roger...copy THAT!! I intend to be UBER careful, but knowing that Mr. Murphy can show up at any time, I figured that I better know what to do in worst case scenario ahead of time. As always, I thank you for your knowledge and advice!

Kcstott
06-07-2018, 06:58 AM
so here's a question. With the plus and minus rollers on the market where should one start with roller size on a rebuild? I'm going to be completing my Cetme soon and would like to have room to swap to larger rollers once or twice in the life of the rifle but I think that would also mean a barrel change too. I can't see it wearing all that fast but I don't know. Someone should add to the stickies where a good starting point would be on roller size.

Anyway. New guy here. found lots of resources pointing me here and weapons guild, vast wealth of information here is very much appreciated.

holescreek
06-07-2018, 10:16 AM
Sadly, the "stickies" area is not well maintained here, that's why new builders have to keep asking the same questions over and over.

I've personally never started with undersized rollers but if I did, I'd go to -2's just to be conservative. Maybe -4 if I'm planning on shooting out a barrel.

Are you the same Kcstott from calguns?

Kcstott
06-07-2018, 11:02 AM
Thanks at least I have a starting point now. I still need the measure what’s in the bolt at this time. Kit is one of the Apex kits
And yeah I’m the same Kcstott from Calguns, accurate reloader, weapons guild, the AK files, and a few other boards.

Kcstott
06-14-2018, 11:48 AM
So I measured my rollers they are a -2 so good to go as is. I’ll press the barrel till I hit .016”-.018” and call it good.
Barrel from Sarco showed up with a happy little surprise. They threaded the muzzle 5/8-24 so I have a huge selection of brakes available but more so I don’t have to buy a tap as I make my own brakes. I’ll copy the existing flash hider but machine it internally to be a muzzle brake.

holescreek
06-14-2018, 02:01 PM
I made an M15x1 adapter for my Rugged Surge this week to start testing LP's on standard length Cetme barrels. I haven't tested the suppressor on a regular Cetme yet and I have 45, 40, 37 and 35 degree locking pieces to try out.

54192

54191

Kcstott
06-14-2018, 03:47 PM
My state won’t let us play with cool toys like that.

scottz63
06-14-2018, 08:04 PM
I made an M15x1 adapter for my Rugged Surge this week to start testing LP's on standard length Cetme barrels. I haven't tested the suppressor on a regular Cetme yet and I have 45, 40, 37 and 35 degree locking pieces to try out.

54191

That looks pretty cool on there. Nice! :)

pidaster
07-22-2018, 02:37 PM
I made an M15x1 adapter for my Rugged Surge this week to start testing LP's on standard length Cetme barrels. I haven't tested the suppressor on a regular Cetme yet and I have 45, 40, 37 and 35 degree locking pieces to try out.

54192

54191

Nice!