I have a SIG P226 Scorpion that I bought last year brand new. I installed a Grey guns Enhanced Leverage System, Grey Guns Sig P-series custom strut system, and a SIG original SRT kit awhile ago. I have an ongoing issue where the gun will go from SA into DA while firing but it happens randomly. I can shoot 3 magazine without issue and then it will suddenly happen once then go back to SA. I have full dissasembled/reassembled the gun twice and the issue still persists. The overtravel and pretravel adjustments don't show any issues resetting while dry firing. what could be the issue? thank you for your time.

Given that you have installed Grayguns parts, I strongly recommend contacting them as well. Even though their parts are probably not the problem, they are usually very helpful and would be more aware of what might cause it than most of us here.

When a Classic line DA/SA SIG like that decocks on its own when firing, my first thought would be a problem with the hammer/sear interface or, less likely, that somehow you are contacting the decocker while shooting.

Are you absolutely 100% sure that you are not unknowingly actuating the de-cocker under recoil? Not saying you are, but I'd want to rule that out before digging into the mechanicals.

Hello and welcome to the forum, Wronka.

quote:

Originally posted by Wronka:
I have an ongoing issue where the gun will go from SA into DA while firing but it happens randomly. I can shoot 3 magazine without issue and then it will suddenly happen once then go back to SA. I have full dissasembled/reassembled the gun twice and the issue still persists.

The fact that your problem is happening so intermittently leads me to believe that the problem is more than likely something you are doing rather than the pistol itself. If I understand what you are saying, this problem is occurring about once per box of ammo (3 magazines x 15 rounds per magazine).

Is there any chance you could let someone else shoot the pistol and see if they can replicate the problem?