Accuracy fixed.

[bj139]

I took apart a manufactured upper barrel and receiver yesterday and was surprised at how tight the nut was. I used the Brownells rod to hold the barrel. A 2 foot breaker bar almost was not enough torque. It moved the vise which I had clamped down to my table saw. I had to turn the barrel wrench horizontal and finally got it loose. The old barrel extension was a tight fit and the new barrel extension was also. I torqued the nut to 30 to 40 foot pounds with my 2 foot breaker bar pulled on about 15 to 20 pounds. Good enough for testing. Loctited the scope mount screws.