Polished Trigger FAIL

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tulsacrittergetter

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Well, my new Crossfire II scope from Primary Arms came in Friday afternoon, so I spent Friday afternoon / evening mounting it to my new long-range rig that I recently built, and headed to Tulsa Firearms to just get it on paper so Sunday I could go out to Happy Hallow. But, the main reason I wanted to go to Tulsa Firearms was to test a backup mil-spec trigger I had been working on. I've been polishing the contact points on this trigger with the intentions of actually using it in an LR308 build I'm helping a friend with. He doesn't want to spend $200 on a drop-in trigger because he has already gone over budget on the build (so far, we've ordered a little over $1,400 including the Crossfire II optic, and another $450 still needs to be spent). So, I had an extra mil-spec trigger laying around, and along with some reduced power JP springs, I figured it would be a temporary fix until he could afford a nice drop-in trigger (even though he'll likely end up with some light primer strikes with the 308).

Anyway, I took some 1,500 grit to the contact points, and then used some red Dremel polish, and then a little Mother's Aluminum polish after that — they are "mirror finish" shiny. To make a long story short, I've never polished the contact points this way. I usually just take some 1,500 - 2,000 grit to it...enough to get the larger "pits" out of the metal, and then call it quits. This always results in a much nicer (and smoother) trigger. So, I went a little overboard on this one...cause I wanted it to work well for my friend.

Well, as I stated, I wanted to test this trigger out...to see if it was going to be a good solution for my buddy's 308 build that we're working on. So, I'm all setup at Tulsa Firearms....I have my AR sitting there with bipod attached....my target is down range, and I sit down and get setup. I pull the trigger slowly because I want to see where the break is.....and BLAM BLAM BLAM BLAM BLAM BLAM! 6 rounds went off in what felt like the SAME TIME. It was full-auto. Everyone at the range turned to look at me, and naturally, I was the ONLY person on the rifle range, so everyone knew it was me.

Luckily, I am there 2 times a week, so they know me well enough to not assume I brought in an illegal fully-automatic weapon. Full-auto is fun, but let me tell you....ACCIDENTAL full-auto sure makes the adrenaline kick in!

On the plus side, I apparently tuned by newly installed adjustable gas block properly when I put it on, because the rifle cycled (albeit, in full auto) beautiful, and the recoil was practically non-existent. So, I'm pretty excited about that. Yeah.

Picture of the overly polished hammer is below. Has anyone else on here made this mistake, or done this on purpose? Just wondering. I've never heard of anything like this before.

hammer-polish.jpg
 

adamsredlines

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Yep, always best to hold on tight after a good polish job. I dont trust myself enough so never done it but have seen others turn their semi autos into burp guns. No thanks!
 

mr ed

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Thats why you only load 1-2 rounds on a fresh trigger job. Then slowly work your way up to a full mag.
also paint the polished areas with dykem to see how even your polish job is.
 

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