Grant's recipe for success;

*NOTE, assumptions are made that the builder will be using KNOWN, QUALITY barrels, receivers, etc.

1. Tight fit between barrel extension and receiver.
A. You can use loctite, but assume that if Green is used, you probably won't get it back apart.
B. Just use a BCM or VLTOR receiver as they specifically undersized the barrel extension hole (tight fit).

2. Check that the upper receiver M1913 rails are square and true.
A. We use a Tru-Stone from Starrett to verify.

3. Barrel nut is at or under 40lbs.
A. You can use shims if the barrel nut design doesn't allow for correct timing at that poundage.

4. FH/MB is timed (5 O'Clock position) so as not to put to much pressure on the end of the barrel (which causes "trumpeting").
A. Use shims to time.

5. Fit bolt to barrel extension. J. Noveske taught me this (along with ranges for each barrel length and gave me the gauges he had made).

6. Square and true the barrel and then re-crown (30 degree).

7. Be a good shooter! Use a good trigger! Use good ammo! Use good glass! Well, Duh! ;-)



C4