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On the recrowning I have done, including match grade barrels, I chuck them in a lathe and use a single point tool to cut them.
They are in a four jaw chuck, are indicated to .0005 then cut.
Works...

This is a bolt I built, fluted Douglas, 03A3 action, my own mount and blocks, Mac stock,
modified M60 flash suppressor.L&S Ultra M3 10X with Mil dots. 30MM ultra rings.
It is in 30 Cal., Sports a...

Loctite only works when the exposure to Oxygen ends.
I have a large squeeze bottle of heavy duty red that is 18 years old and still works fine. used it yesterday to lock on a 03A3 rear sight, solid...

I am currently finishing fitting of a Dupage laminated to one of my M1's.
I have had to remove about .010" from the leg area, it appears the cutters were not set right.
I say that because a...

Following for ejection failure; weak eject spring, m1 ejector added (single face cut). Weak op rod spring and oversize gas hole. Correct m1a's and real 14's have no eject problens. These are the...

There were only about 100 bpt pv-4 adaptors that were released to the public. Most production went to ft bragg for the airborn and to 5th and 10 special forces.