Lilja Group Buy Barrel Accuracy

[calshipbuilder]

Nice report. Something I see right away that might be limiting you:

Your forward scope ring is bridging from the upper to the handguard.

Did you check if the receiver face was square by any chance? What was the extension mate-up like with the upper?

Didn't check the face, I'm trusting that the ultramatch meets their description:

The most critical features are:

• Parallelism between the picatinny rail, main center bore and the centerline of the mounting lugs
  
• Perpendicularity between the centerline of the lugs and the barrel mating face (at the front of the threads)
  
• Flatness of the barrel mating face
  
• We are holding .0003 or better on all of those measurements. Competitor uppers are between .001 and .003 on the perpendicularity and parallelism.
  

Extension fit in the receiver was snug, but not tight, I did not bed it with loctite

The front ring is plenty tight and the fit between the handguard and receiver is flush. I don't think anything is moving between the upper, handguard, and barrel nut. I can't move the front ring back due to eye relief, do you think moving it further forward onto the handguard will make a better mount? Everything is nice and tight on the rifle.