Vendor states bolt should be fitted to AR barrel. Does this involve anything besides a pair of headspace gauges?
Found my copy of Kulek and McKee.
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Vendor states bolt should be fitted to AR barrel. Does this involve anything besides a pair of headspace gauges?
Found my copy of Kulek and McKee.
depends, if it is a custom barrel it may need to be reamed (headspace) once the collar is installed,
most are prefit, as in cut to headspace w/o any reaming needed,
Kuleck/McKee 'AR-15 Assembly Guide' details a procedure for the assembled upper. Sounds like a check for proper lockup.