Rifle Stock would not tighten

[survivalshop]

      I was going to go to the range this morning & was going to clean the Barrels on the there 308 AR's I was going to compare & noticed the MOE Rifle stock on the 18" ,felt loose. I looked it over & sure enough the Stock had a little play , easy fix , tighten the Stock Screw , screw tight , Stock not , so I try to loosen the screw & thanks to the blue loc-tite on the screw supplied by Magpul or I just tighten it up too much , I unscrewed the Receiver Extension , I tried to find some way to hold the Receiver Extension , but I took the whole assembly off to work on it better.

      After several attempts at being nice to it with a strap wrench & wrapped in a vice ( worried about Vice distorting by being too tight ) but when wrapped in Leather or Teflon Gasket material , the Receiver Extension just would pop out of the Vice with any kind of trying to tighten , so I wrapped the stop flange on the Extension with Leather & used my curved Channel Locks & the screw loosened up & I only left a small nick in the Extension , no big deal , you have to really look to find it .

      It appears that the Threaded hole for the Screw was not completely finished or had incomplete threaded area . The TPI is 28 tip , it looks ( I have a Gage ) & I think its 1/4" screw , so 1/4 x 28 , if that is indeed what it is  ( I still have to check the screw size ) it was a common small screw size for vintage Harley's , but I don't have a Tap in that size , so I used the screw & it may have just had a small area of the threads that was damaged or incomplete , but the screw turned all the way in . 
 
      Magpul supplies a short Screw with the hole in it & it has that dry Blue Loc-Tite on it & looking down the Extension with the screw all the way bottomed out , it doesn't protrude into the Extension , so the Buffer will not be restricted in any way & now the Stock is nice & tight .

      This is the first Rifle Stock build I have done since my first 308AR , a 20 HB rifle & I don't know if this is normal , but make sure if you use a Rifle Receiver Extension , check the Threads , this was purchased from a very reputable source . 

     A First for me & by the time I got done dicking around with this rifle , it got a good wind blowing , so I didn't go to the range.

[blue109]

That is pretty strange. Never had that happen.

[survivalshop]

  I'm thinking the stock must have seated in some way after the last shoot , strange it has been tight since day one of instillation . Rifle has had some intensive testing because of the D.Wilson BCG not wanting to run reliable in this particular rifle . I have been doing a lot of rapid fire to heat the Barrel up , because this is when the BCG starts to fail . 

  Just odd about the threaded hole for the Stock screw bottoming out or binding .Good to go now .