View Full Version : Grrr... AR15 Problem with hammer pin.

11-28-2009, 9:04 PM
When I was shooting it today, the pin for the hammer some how wobbled out and the hammer was at a weird angel . What should I do to remedy the problem?

11-28-2009, 9:07 PM
Get a new hammer or get the KNS anti rotation pin kit. The "J" hook in the hammer you have now isn't doing it's job by keeping the pin in place.

11-28-2009, 9:10 PM
Thanks for the idea about the KNS anti rotation pin kit.

11-28-2009, 9:13 PM
Check to make sure the hammer springs are above the trigger spring, too. That keeps the trigger spring from walking, but also ensures the hammer spring has proper tension.

Are you certain you installed your hammer spring in the correct orientation, as well?

You can also manually check the hammer pin's j-spring to be sure it's holding as it should.

11-29-2009, 8:08 AM
I had the same problem when I first took my AR out to play. Installed the KNS pins and haven't looked back.

Group B
11-29-2009, 11:42 AM
My buddy had the same problem, right after he built his first AR.

Turns out the hammer from the stag lpk he bought had no j-hook in it, so stag sent him a new one that did...problem solved.