Stoning the Stoner

[Hebrew Battle Rifle]

I recently finished assembly of an AR. The Lower parts kit (lpk) is DPMS and the trigger pull is terrible. Would one of you detail how you corrected a horrible trigger without replacing parts? Suggestions to "just get blah blah blah FCP" are of no value to me.

Thnks
HBR

[Sharpshooter]

HBR my experience has been that the DPMS LPK's usually have a pretty decent trigger, however if you need to tweak it a little all I do is polish the engagment areas a little bit and that smooth's things right up as a rule. On AR triggers you really want to avoid removing metal if possible. Another option may be that you need to goto a two stage trigger assy instead of the traditional single stage AR as it is not to the liking of most people.

[instr8]

Well, theres always the cut one leg off of the hammer spring trick. I tried it on an Armalite and it helped but didn't make all right with the world. BE WARNED: Sometimes this makes misfires on hard primers.

[metalryder]

I have a small fine sharpening stone that I have used to clean up the engagement areas on the hammer and trigger.

Advantage is that you get a very polished surface and if you clamp the part in a vice first, you can keep the surfaces very true to each other.

[Hebrew Battle Rifle]

Well, this trigger is awful. The pull is very long and I can watch the hammer moving down ( as if it were being cocked) until it finally trips. I think that I will put it in the mill and take some metal off and thin it up a bit. If I screw it up it, isn't like AR triggers are hard to find or wallet busters.

[MrGoodwreck]

That is a bummer, DPMS LPK's are the ones that I always try and go after because they have nice pulls. As soon as ARFcom comes back up, head over and look up "20 min trigger job"...that works pretty good on some of my shitty Oly LPK's

[GrumpyM4]

Simple.

remove parts kit.

take each pin and place just the very tip in a power drill so that the majority of the pin is exposed. Take fine steel wool, then turn on power drill and LIGHTLY polish the pins. Be sure to remove pin, exchange ends and also do the part that was covered by the drill chuck.

Then, take small bore brush (preferably an old, beat up bore brush with most of the brass bristles bent down and flattned), wrap in same steel wool, place in same said end of power drill and run this through the pin holes on the hammer and trigger pieces. Polish the INSIDE of these parts.

Take paste polishing compound such as simi-chrome, a dremel with a felt polishing tip, and go to town on the actual engagement surfaces.

I would NOT suggest stoning anything unless you are VERY comfortable with the stone and know how to do so without removing too much metal.

The method I gave is the easiest and most simple method for a novice to do that pretty much guarantees you won't screw it up and destroy your hammer and trigger or the pins.

Oh yea, and use a very good grease on all the parts when you return them to the lower reciever. I would actually suggest degreasing the parts entirely before applying either a lithium grease or my favorite grease Nikal. Then reassemble and add alittle more grease to the high wear surface areas.

Final tip to smoothing out a trigger....shoot the shit out of it. All the above helps, but actual use does more for a trigger.

Enjoy!

p.s. I would not EVER remove any of the legs of the hammer or trigger. I can't tell you how many of these I have had to replace with stock springs whilst at shoots with other people because they did this and started getting shitty primer strikes. The have two legs for a reason.

[Zombie_Hunter]

HBR my experience has been that the DPMS LPK's usually have a pretty decent trigger, however if you need to tweak it a little all I do is polish the engagment areas a little bit and that smooth's things right up as a rule. On AR triggers you really want to avoid removing metal if possible. Another option may be that you need to goto a two stage trigger assy instead of the traditional single stage AR as it is not to the liking of most people.


what he said only I would just go with a two stage or a better single. If you are stuck on single JP makes a great one.

[Sharpshooter]

what he said only I would just go with a two stage or a better single. If you are stuck on single JP makes a great one.


Your absolutely right about that JP single stage it is slick .