Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel
Member Login
Site Notices
11/22/2017 10:05:29 PM
Posted: 9/24/2004 3:05:53 PM EST
I'm right in the middle of replacing my M4gery barrel with an evil threaded barrel complete with flash hider and bayo lug. I have the upper removed from the lower. The hand guards removed. The gas tube retaining pin carefully tapped out of the front sight base/gas block, mindfull to the narrow and wide ends of the retaining pin hole.

But the gas tube is still stuck in the gas block and I can't seem to get it out. What should I try, more force?
Link Posted: 9/24/2004 3:16:52 PM EST
wrap it with a rag, put gentle pressure on the tube with a pair of pliers..................tap the pliers with a small hammer
Link Posted: 9/24/2004 3:17:35 PM EST
Link Posted: 9/24/2004 3:19:22 PM EST
or oxy acetylene......................

Link Posted: 9/24/2004 3:19:57 PM EST
Wow there are narrow and wide ends of the retaining pin hole???
Link Posted: 9/24/2004 3:20:51 PM EST
I had the same problem. I put the gas tube(covered with cloth) in a vise, and gave the butt of my rifle a good and sharp hi,t and it came right out. But be careful. Its easy to scratch your barrel and other parts this way.
Link Posted: 9/24/2004 3:25:33 PM EST

Originally Posted By SNorman:
Wow there are narrow and wide ends of the retaining pin hole???



i don't remember there being, i thought it was just a roll pin and not a tapered pin
Link Posted: 9/24/2004 3:29:06 PM EST
Heat the front site post with a propane torch for about a minute. Carefully twist the tube back and forth, gripping it as close to the post as possible. After it's loose, it'll pull straight out.

Use a little anti-seize compound during re-assembly.
Link Posted: 9/24/2004 3:36:17 PM EST
[Last Edit: 9/24/2004 3:36:38 PM EST by TexRdnec]

Originally Posted By SWS:
Heat the front site post with a God's Gas torch for about a minute. Carefully twist the tube back and forth, gripping it as close to the post as possible. After it's loose, it'll pull straight out.

Use a little anti-seize compound during re-assembly.

Link Posted: 9/24/2004 3:42:55 PM EST
Stand the barrel on its muzzle. Put just a bit of Kroil, or some other penetrating oil on the gas tube where it goes into the gas block. It may take a while to get in there. A pair of rubber jawed pliers are nice for this job.
Link Posted: 9/24/2004 3:49:46 PM EST

Originally Posted By TexRdnec:

Originally Posted By SNorman:
Wow there are narrow and wide ends of the retaining pin hole???



i don't remember there being, i thought it was just a roll pin and not a tapered pin



Not tapered, 5/64" X 5/16" rollpin.
Link Posted: 9/24/2004 3:50:54 PM EST
Just had a sticky one this afternoon, roll pins are the same size on either end.

Pliers and a tap with a tack hammer did the trick.

A little Kroil soaked into around the tube to FSB connection might make disassembly easier.

Danny
Link Posted: 9/24/2004 3:50:58 PM EST
Link Posted: 9/25/2004 3:09:12 AM EST
[Last Edit: 9/25/2004 3:26:07 AM EST by pale_pony]
Thanks! Got it unstuck
Link Posted: 9/25/2004 3:12:24 AM EST

Originally Posted By pale_pony:

But the gas tube is still stuck in the gas block and I can't seem to get it out. What should I try, more force?



Get a bigger hammer.

Top Top