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  #1  
Old 06-07-2011, 5:56 PM
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Default cutting the tail off an AR Hammer

wanted to get into doing a little trigger work and have been thinking about cutting the tail off of my AR hammer. my question is if using a cutoff wheel will the amount of heat made mess with the temper or hardness of the the hammer? i have access to a band saw so i could always go that route.
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Old 06-07-2011, 6:03 PM
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Your hammer doesn't look like the one circled in red, right?


If not then I'd worry about whether the reduced hammer has enough mass to be 100% reliable with all types of primers. I don't think it will affect the hardness if you go slow with your cuts. AR hammers are still cheap if you screw them up
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Old 06-07-2011, 6:17 PM
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a belt sander would work better just grind it down dipping it in water when it gets hot in your hand
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Old 06-07-2011, 6:26 PM
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and what benefit are you expecting?
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Old 06-07-2011, 6:31 PM
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Shorter lock time probably
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Old 06-07-2011, 6:47 PM
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Shorter lock time probably
exactly! I noticed the hammer in my V-tac has been seriously re-worked and thought Why cant I do something similar. wanted to swap my springs re-work the hammer and polish the sear surfaces.
this is what i want the end result to look like:
http://www.jprifles.com/buy.php?item=JPSH-1A
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Old 06-07-2011, 6:48 PM
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Don't mess with your disconnector!
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Old 06-07-2011, 7:24 PM
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^^^ yeah I know I can go out and buy a trigger and i have the money to. but sometimes why not see what you can accomplish? when polishing the sear no power tools will be used. ive heard of people using a little polishing compound and doing it by hand OR putting a dab of compound on both surfaces and actuating the trigger a number of times and let the compound do the work.
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Old 06-07-2011, 7:38 PM
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Quote:
Originally Posted by norcal-ar View Post
^^^ yeah I know I can go out and buy a trigger and i have the money to. but sometimes why not see what you can accomplish? when polishing the sear no power tools will be used. ive heard of people using a little polishing compound and doing it by hand OR putting a dab of compound on both surfaces and actuating the trigger a number of times and let the compound do the work.
I think he meant if you mess with the disconnector you can end up with a FA rifle.
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Old 06-07-2011, 8:18 PM
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yeah dont worry guys im not going to mess with any thing (re-shaping wise) other then cutting the top tail piece off.
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Old 06-13-2011, 9:44 AM
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I have a DPMS trigger kit with the hammer tail ground off. i clamped a angle grinder to my bench and used a cutoff wheel to chop off the tail. Hammer was held by vice grips. I then sanded and polished the cut on a disk sander/ polisher.

Using a stock hammer spring with the 15minute mod I get no lite strikes with wolf 223primers/Winchester small rifle primers. With a stock hammer spring with one leg cutoff I get 1of10lite strike on wolf 223 primers and perfect operation on Winchester small rifle primers.

I've shot around 1000 rounds with these setups and have see no noticeable difference
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