Lr 308 doms barrel blank help

[marazzi59]

Hello to all
I am planning on machineing a new barrel from a blank for a gen 1 doms lr308 pattern large frame ar. Looking for help on the exact steps needed. Thread tenion length, class of thread fit, how much crush fit to allow for, do I need to chamfer the mouth? Any help appreciated

 

[paperpuncher]

Heres the tenon https://forum.308ar.com/topic/15708-ar10-barrel-trunnion-dimensionsdrawings/
heres the barrel https://forum.308ar.com/topic/15708-ar10-barrel-trunnion-dimensionsdrawings/

 

[marazzi59]

Paperpuncher I really appreciate your help, any other tips or tricks? Thanks again

 

[msalm]

Just measure headspace and tenon length with the bolt installed in the extension. 2-3 thou excess for headspace and I used 7-8 thou for tenon/bolt clearance. Chamfer is around 25 degrees or so for 150 thou wide or so (if I remember right anyway)

 

[akajun]

Is it for a gen 1 or 2? The extensions and threads are different .

 

[butchlambert]

Is it for a gen 1 or 2? The extensions and threads are different .

I believe he said Gen 1.