09-14-2019, 12:16 PM
FRB6.5 Wrote:Placing shims between the receiver and extension has the potential to change headspace. The proper location is between the extension and barrel nut.
I thought this may change headspace, but I didn?t want to bother asking the question. I saw some folks build it up this way on line.
Proves you can?t always trust what you see.

