Question regarding barrel fitting

[fedupflyer]

IMO.. Bedding, shimming and truing have NO value other than to the plumbers charging you to do it!!!

100% Agree!

I just completed a AR accurizing course and one of the (main) things that we did was truing the receiver face, shimming the barrel if needed and bedding the barrel using green loctite.
In my case the groups went from 1.3 and 1.47 MOA at 100 yds
to .53 and .88 MOA.
Roughly cut my groups in half.
Not bad for a chrome lined barrel and less than $5 in extra materiel.
That is if you are actually interested in accuracy.

[Corse]

Any information to share from the course?

[HKGuns]

I just completed a AR accurizing course and on on the (main) things that we did was truing the receiver face, shimming the barrel if needed and bedding the barrel using green loctite.
In my case the groups went from 1.3 and 1.47 MOA at 100 yds
to .53 and .88 MOA.
Roughly cut my groups in half.
Not bad for a chrome lined barrel and less than $5 in extra materiel.
That is if you are actually interested in accuracy.

Heh, this one got bumped. Amazing what you can learn in a relatively short period of time.

I've now using lapping compound on my receiver faces and will start using the 620 product to fill any imperfections in that dimension.

There is always something more to learn in this "hobby" for lack of a better term.

Yes, please share some tidbits.

[fedupflyer]

Heh, this one got bumped. Amazing what you can learn in a relatively short period of time.

I've now using lapping compound on my receiver faces and will start using the 620 product to fill any imperfections in that dimension.

There is always something more to learn in this "hobby" for lack of a better term.

Yes, please share some tidbits.

Here a just a few things that pop into my brain as I am typing

Buy a/an undersized upper so you don’t have to shim
use a reaction rod for barrel installation
use a receiver facing tool
use 200 or 300 grit for lapping compound maybe a combo of the two
green loctite over red for bedding a barrel
yes you can remove a bedded barrel, just takes some heat and a little pounding
use chemical and a wire brush to remove loctite (I used a steel automotive brush and goof off)
forged over billet
check feed ramp fitment into the upper and sharpness of the feed ramps
nitride barrel over chrome for hard use barrels
chasing your threads is helpful for a new build, def want to do it for a rebuild
remove bolt from BCG to test smoothness of fitment into gas tube and push up slightly while moving the carrier back and forth
buffer tube should be smooth can hone it with a brake honing tool if needed
use shims for timing muzzle device
using a bore-scope can be scary

[lysander]

One of my fave topics.
Post #13 is not 100% accurate.

Post #13:

100% Agree!

Are you saying you know more about what he agrees with than he does?