AR15.Com Archives
 Eliminating failure to fire and light hammer strikes
PimpedGSG  [Member]
7/3/2009 9:46:37 PM
Could it be this easy? Shot about 400rds today but noticed I had more failure to fire and light hits than ever. I stopped to think about things when I decided to take my stock off and look, a quick field inspection revealed that the bolt stop screw was loose. I guess this gets the hammer all out of whack and sets up for light strikes. I tightened this bitch up and viola no problems. I'm wondering if this is the reason the FTF's occur altogether. I swore it was the magazines, now perhaps this is the reason. I don't think I ever noticed it before because I clean my gun after every time that I shoot, tightening the bolt stop screw regularly......I guess I should locktight it down, I never did because I am always in there cleaning.
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M4-Daddy  [Member]
7/4/2009 6:15:54 AM
Could you post a picture please? What is the part number?
PimpedGSG  [Member]
7/4/2009 10:16:59 AM

the part is listed as 48 and 49. a screw and washer. Your looking at the back end of the gun with the stock removed and the trigger grip removed
Zamo  [Member]
8/15/2009 1:06:33 PM
Just had the same problem out at the range. Applied the same solution, and WHAM-O! Worked like a charm. If there ever was a good reason for buying real HK push pins, this is it. Just popped off the stock, tightened it up a bit, and off we went. Now that I'm home, I'm going to apply some loc-tight and do it right.
TRIDENT1982  [Team Member]
8/15/2009 8:09:47 PM
Damn i just had the worst performance ever just about an hr. ago. The gun fired ever time ejecting perfectly the round and cycling the next perfect,,,,,but wow it defied physics on all 7 rounds. And believe it or not...cycled the round ejected the last round but never re-cocks the hammer. This really are the most fustrasting guns bar far to deal with, but i still love my pks. Anyway after loctited that buffer plate screw 3 TIIMES i figured it would go awhile.WRONG> this time is was the worst yet....almost unscrewed for real.

Disappointing thing is i dont wont to babysit this damn screw for the life on the guns.
PimpedGSG  [Member]
8/16/2009 12:40:21 PM
I wish there was an easier way, but once I used locktite, it held up good
TRIDENT1982  [Team Member]
8/16/2009 10:42:27 PM
you must use red loctite...3x ive used blue
SRTgunner  [Member]
8/18/2009 2:03:18 AM
isnt red permanent? that was my understanding.
agriebel  [Member]
8/21/2009 8:07:40 AM
Red loctite is only removable by heat. Use blue.
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