M1CarbineForum
M1CarbineForum
Home | Profile | Register | Active Topics | Active Polls | Members | Private Messages | Search | FAQ
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 Technical Discussion
 Maintenance & Troubleshooting
 Gas Piston stuck on my IBM M1
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

utgrad74
Starting Member


USA
2 Posts

Posted - 02/11/2018 :  10:29:02 PM  Show Profile Send utgrad74 a Private Message  Reply with Quote
Let me start by saying I have looked at many posts on this subject and still have questions so I apologize in advance.
The IBM carbine was carried by my father in WWII and brought home with him in Dec 1945. Given to me in 1967 when I was about 16, shot by me very lightly, bore and action cleaned by me and basically safe stored. I really didn't investigate or get really interested in the details of an M1 until the last 12 to 18 months. The gun is as produced in 1943 except for barrel clamp, sling and wood finish. I haven't shot the carbine since the 1990's. When photo documenting the components recently I noticed that the gas piston won't move freely or with 90psi air pressure applied into the barrel while the breech is temporarily plugged. I have partially filled the plugged barrel with solvent, let it sit overnight to attempt to dissolve any residue that might be seizing the piston. Clean solvent leaks out around the threads and piston but the piston still won't move. The physical condition of the exposed piston and threaded nut are pristine. No mechanical damage and no external corrosion.
Finally my questions:
- Is it safe to fire the carbine in this condition and if the rifle actuates/functions correctly no problem with piston function exists?
- If not safe to fire based on my description what is recommended course of action? Most forum posts say not to remove piston nut unless absolutely necessary.
I appreciate any experienced inputs I can get on this subject. I am a complete novice when it comes to this weapon.
Thanks utgrad74

Google AdSense

USA
Mountain View


Jackp
Veteran Member



USA
1033 Posts

Posted - 02/11/2018 :  11:22:22 PM  Show Profile Send Jackp a Private Message  Reply with Quote
Hi and welcome to the forum from New Mexico!

It's not unusual for the piston to seem stuck after sitting for a while. It's probably safe to fire and I bet it will operate normally after being exposed to 30,000 - 40,000 psi and thousand degree temperatures. It is very unusual for a piston to remain stuck after firing and even if it does, it probably is not dangerous.

Check back with us after shooting it and let us know how it goes.

JackP

Edited by - Jackp on 02/11/2018 11:24:54 PM
Go to Top of Page

utgrad74
Starting Member



USA
2 Posts

Posted - 02/12/2018 :  08:21:45 AM  Show Profile Send utgrad74 a Private Message  Reply with Quote
I thank you for the quick response. I was hopeful this would be the response I would get but wanted to hear from someone with more practical experience than I have with the M1. I will let you know the results of firing. That may take a while since I am recovering from lower back surgery.
utgrad74
Go to Top of Page

jimb16
Moderator



USA
3111 Posts

Posted - 02/12/2018 :  9:44:38 PM  Show Profile Send jimb16 a Private Message  Reply with Quote
Carbine pistons that don't want to move are common, but they usually function fine when firing the gun. Take it out and shoot it. I'll bet it works just fine.

OGCA Lifer,NRA Life member, son of a 325th GIR Glider Rider
Go to Top of Page

HB of CJ
Junior Member



USA
75 Posts

Posted - 02/14/2018 :  3:18:23 PM  Show Profile Send HB of CJ a Private Message  Reply with Quote
I just now saw your post. Same answer. What you might have is some very slight corrosion freezing the piston. Like already said better, just shoot the USGI keeper Carbine.

It will probably work fine. The gas piston is generally a non maintenance item. Lots of gas pressure going down that 0.070 diameter gas port. The piston will move OK.
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
M1CarbineForum © 2007-2017 M1CarbineForum Go To Top Of Page
Snitz Forums 2000
RSS Feed 1 RSS Feed 2
Powered by ForumCo 2000-2008
TOS - AUP - URA - Privacy Policy