Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel
BCM
User Panel

Page AK-47 » Build It Yourself
AK Sponsor: palmetto
Posted: 10/25/2015 7:02:19 PM EDT
anyone have any ideas or jigs that would help press on a gas block while the barrel is still riveted in the receiver? I'm using a 20 ton press and I have it half way on but it looks like the barrel will start bending if I continue.

I'm thinking about taking it off and opening it up a little on the lathe? open it just enough that i still need to press it on but goes on easier. I am pinning it too.
Link Posted: 10/25/2015 8:10:52 PM EDT
[#1]
Did you measure your parts in relationship to your barrel before pressing?
Link Posted: 10/26/2015 2:37:44 PM EDT
[#2]
difference in barrel and gas block is 0.01" ... Too tight?
Link Posted: 10/26/2015 7:40:25 PM EDT
[#3]
The barrel should be .001 - .002 larger than the trunnion.
Use anti-seize compound before you press it in
Make sure the barrel is perfectly vertical and the press is level
Look and see if the barrel is clearing the rivets.
Check out the Forbus barrel tools. Can't beat them.
That's all I got, good luck.
Link Posted: 10/27/2015 10:53:05 AM EDT
[#4]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
difference in barrel and gas block is 0.01" ... Too tight?
View Quote


Way too tight.  

I use a piece of black iron pipe with a brass coupling at the front, and an aircraft riveting hammer (controllable impact with tickle trigger).  I never apply any pressure to the barrel itself.  They will bend.


Link Posted: 10/27/2015 2:20:38 PM EDT
[#5]
yeah I took it off yesterday after talking with a friend needs to be more like 0.003"
Link Posted: 10/27/2015 6:56:15 PM EDT
[#6]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
yeah I took it off yesterday after talking with a friend needs to be more like 0.003"
View Quote

.002 is the maximum difference
Page AK-47 » Build It Yourself
AK Sponsor: palmetto
Close Join Our Mail List to Stay Up To Date! Win a FREE Membership!

Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!

You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.


By signing up you agree to our User Agreement. *Must have a registered ARFCOM account to win.
Top Top