Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel
Member Login

Site Notices
Posted: 11/2/2004 10:14:28 AM EST
Can someone tell me the OD for the threads on the barrel? I removed the MB off a barrel I have, I don't have a FH on hand to try, the reading I get with my caliper is 0.600 inches. Does this seem right for the 1/2x28 threads? Thanks
Link Posted: 11/2/2004 11:52:32 AM EST
No, 1/2 inch = .500, which is what (less a thou or 2 for clearance) the outside dia of the thread should be for a 1/2 - 28.
Link Posted: 11/2/2004 5:32:57 PM EST
I believe .6" will allow you to use a 1/2"-28 threaded flash suppressor, that is to say there is enough 'meat' to allow 1/2"-28 threading.
Link Posted: 11/2/2004 5:48:21 PM EST

Originally Posted By lobogris:
Can someone tell me the OD for the threads on the barrel? I removed the MB off a barrel I have, I don't have a FH on hand to try, the reading I get with my caliper is 0.600 inches. Does this seem right for the 1/2x28 threads? Thanks



If you get the first 5/8" of the barrel turned down on a lathe to 0.500, you can thread it 1/2x28, but then you only have a 0.050" shoulder for the FH, which isn't really enough, IMHO. Does the barrel get bigger behind the the 0.600" section where the MB was located?
Link Posted: 11/3/2004 3:30:48 AM EST
The barrel goes to 0.732 behind the threads. I emailed Adco to see if they can recut the threads, if not to see if they can cut barrel , thread,and perm attach an A2 to keep it at 16"
Link Posted: 11/3/2004 3:37:37 AM EST

Originally Posted By lobogris:
The barrel goes to 0.732 behind the threads. I emailed Adco to see if they can recut the threads, if not to see if they can cut barrel , thread,and perm attach an A2 to keep it at 16"



Ok, .732 gives a much better shoulder; Adco should have no problems turning/threading it.
Link Posted: 11/3/2004 10:20:54 AM EST
[Last Edit: 11/3/2004 10:39:21 AM EST by rimfire50]
Text deleted after some reflection!!
Top Top