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January 13, 2016, 08:41 AM | #26 | |
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I'm doing an install of two of their complete trigger groups right now. A bit of work--taking me a day to do versus a few minutes with most others. But you learn a heck of a lot about fire-control reliability over the long haul with their instructions--definitely gives pause for thought when considering the "just polish the sear/connector/spring" camp. I don't know if the video that comes with trigger is available on their website--but it is an eye-opener and good viweing for anyone who wants to work an AR triggers. The kicker is that I'm working on xx 308 platform rifles so I can't go under 4.5lb draw trigger spring--which is OK anyway since that's my preferred draw weight.
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January 13, 2016, 09:35 AM | #27 |
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Looks good, I think I will start with the spring kit and a polish. Nothing to lose in doing that.
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January 13, 2016, 10:20 AM | #28 |
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My inexpert opinion--regardless of the avalanche of flames to the contrary that I'm sure I'll get--is stay away from ANY polishing of crucial trigger/sear connecting interfaces until you put several hundred rounds through your gun with just the springs--unless you are absolutely certain what the consequences could possibly be other than a smoother/lighter break.
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January 13, 2016, 10:37 AM | #29 |
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I currently have only 100 rounds through it. What I'm seeing with the upper removed, is that when I pull the trigger the hammer rocks back before it breaks. (No I'm not letting it hit the bolt catch or mag well.) this tells me the angles of the hammer\sear are incorrect. Am I wrong about that?
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January 13, 2016, 11:45 AM | #30 | |
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January 13, 2016, 02:42 PM | #31 |
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+1 for the rra match trigger. relatively inexpensive, and feels great! or go for the geissle sd-c
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January 13, 2016, 08:15 PM | #32 |
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What I mean is that the hammer rocks back in the same way a double action revolver would upon pulling the trigger. It moves approximately 1\8 of an inch before it breaks. This makes me believe the surfaces are not flat against each other.
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January 13, 2016, 08:27 PM | #33 | |
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January 14, 2016, 12:00 AM | #34 |
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I did a little trigger work on my wifes ar556. I good understanding of AR triggers, a fine stone and the patience to go slow and try it often resulted in a much better trigger pull, its now smoooooth and just a little shorter, just what I wanted. And as mentioned before I didnt have to spend another $80-200 on a $600 rifle. I spent that on an optic for it.
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January 14, 2016, 12:16 AM | #35 |
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I haven't messed with it yet. I have been dry firing the crap out of it to try to work put some of the gritty feeling. I think its helping. So far about 250 cycles. Kind of takes me back a couple of decades to snap-in barrels. That was fun.....or not.
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January 14, 2016, 07:02 AM | #36 |
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Joe--it just occurred to me that what you might actually be seeing is the release of the hammer from the disconnector prior to the front shelf of the trigger engaging the hammer in the "ready to fire" position. That would give you an audible "pop" and hammer moving forward as you release the trigger from pulled as it resets (with upper removed from lower you should see this)--JP adjustable triggers do this and I know that DPMS uses JP's in the some of their guns like the LR 308 platforms. This is normal for an adjustable trigger like the JP--assuming the disconnector timing is correct (that "pop" of the hammer should happen at or very near the end of the trigger reset).
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"Everyone speaks gun."--Robert O'Neill I am NOT an expert--I do not have any formal experience or certification in firearms use or testing; use any information I post at your own risk! Last edited by stagpanther; January 14, 2016 at 07:21 AM. |
January 14, 2016, 08:03 AM | #37 |
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I'll go against the grain here. If you are prepared to buy an aftermarket trigger anyway why not attempt to improve your current trigger by honing/stoning it?
Testing a trigger is done at home and not at the range so there's no real danger unless you're an idiot. Screw it up? Who cares just buy aftermarket then. I have a fancy geissele trigger that runs over $300.. Glad the guy I bought the rifle from liked spending money . Its the best trigger I've felt in the platform by far. Worth $350? Not my $350. |
January 15, 2016, 04:52 PM | #38 |
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I believe what you describe is normal Joe
[quote] Joe Sixgun: What I mean is that the hammer rocks back in the same way a double action revolver would upon pulling the trigger. It moves approximately 1\8 of an inch before it breaks. This makes me believe the surfaces are not flat against each other.
The design of the factory trigger does in fact cause the hammer to 'jack-back' slightly when the trigger is being pulled, before falling off the sear. That is what causes most of the crappy trigger pull. This is the reason to replace it with a trigger such as the RRA Two Stage Match Trigger http://www.rockriverarms.com/index.c...ategory_id=434 for a well spent $85.00. This trigger will break clean as it has the hammer sear designed away from the pivot pin eliminating what you are describing. If you do not know the difference between a Single Stage and a Double Stage trigger, do yourself a favor and study up on them http://www.thetruthaboutguns.com/201...stage-trigger/ If a person knows how to polish a trigger (most do not) the creep can be improved but the 'jack-back' cannot. BEST TO NOT DO IT. BTW: Your trigger would probably move an eighth of an inch, as you stated, but the hammer 'jack-back' you are seeing is much less. Cheers! |
January 15, 2016, 11:09 PM | #39 |
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Illusion you nailed it. I recently read an article in a magazine that clearly illustrated this condition. What harm would be done by relieving some of the angle from the notch on the hammer?
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January 16, 2016, 07:57 AM | #40 |
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Just my opinion sixgun--I'm not an expert and telling you what you should or should not do.
In general, most people who are dissatisfied with their triggers on an AR (or any gun, for that matter) don't like either the amount of overtravel before hammer break--or the force needed to apply to the trigger to get the hammer to break. The trigger group in a gas operated system like an AR is a pretty complex and dynamic system that is affected by several factors in it's operation. Smoothing a contact surface in the various engagement surfaces to get "cleaner" (i.e. Non-gritty") feel is OK--but once you actually start altering the actual amount of material or angle of the contact surface by substantively removing metal--you are possibly going to affect the entire fire control system--subtle changes in the geometry of how the different parts engage each other can have un-intended consequences such as irregular timing/firing. My personal opinion is unless you fully understand all these issues and are confident that you know what the various inter-reaction outcomes are going to be--I'd go down the "remove material" path as a last step. I would start with low-lying fruit that is easily reversible like a lighter spring kit. My less than 2 cents : )
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January 16, 2016, 09:33 AM | #41 |
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I have a drop-in, never-used 4.5# National Match 2-stage trigger that I am willing to sell. An awesome trigger that I hate seeing go to waste. PM me if interested.
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January 16, 2016, 10:18 AM | #42 |
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^^^^^Don't know what you're asking for it--but I've installed and used a couple of these--great all-around performer with good safety margins built-in and at under $80 or so a great drop-in solution to a stock "gritty mil-spec 6.5 lb'r" disease. : )
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January 16, 2016, 11:34 AM | #43 |
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I've had good luck with the rock river 2 stage, and on the high end the various Geissele triggers.
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January 16, 2016, 11:55 AM | #44 |
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Do not do that!
[quote:] Illusion you nailed it. I recently read an article in a magazine that clearly illustrated this condition. What harm would be done by relieving some of the angle from the notch on the hammer?
No offense Joe, but you have shown that you DO NOT know what you are doing. Rounding (or relieving) an angle is begging for disaster. As stated previously the hardening on the hammer/trigger sears is thin and this is 'why' ONLY polishing is marginally allowed. Think 1000-1200 grit (or less) on an absolutely flat (as in glass pane backed) "scary-sharp abrasive" sheets and an absolutely square edge. NEVER change angles OR round any sear edge. Maintaining the identical angles 'as-was' is how the stock trigger is improved. Some will advocate reduced power springs but they are NOT necessary IF done properly. Most people DO NOT have the patience or ability to maintain the original angles long enough to get a glass-like polish surface. A moly grease like Chip McCormicks 'Trigger Slick' will assist in a (nearly) creep-free break. BUT again, keep in mind that the 'jack-back' is always going to remain on a stock trigger. MY ADVICE: Bite the bullet. Cough up the $85 for the RRA Two-stage trigger while it is still on sale and chuck the original into the scrap parts bin. The RRA referred to previously has a light second stage with a crisp break and a quick lock time. Trust me on this.. You will never look back! |
January 16, 2016, 02:06 PM | #45 |
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For 85 bucks it's not a bad deal to get the RRA NM trigger. Even if it does go softer after a few thousand rounds that isn't a big deal unless you are trying to make trigger pull weight at equipment check in for a leg match.
If you just want a lighter trigger, grease and a JPE spring kit will do that. But there is a reason why the bulk of people responding to this thread have recommended a replacement trigger. I spent the money on SSA and G2S triggers whenever I could get them on sale, but I was building Service Rifles which really need a good trigger to help the shooter be competitive. Jimro
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January 16, 2016, 02:37 PM | #46 |
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There's no start filling and grinding on any trigger when doing a trigger job. Polish only. And change springs.
Like illusion says, changing angles is "begging for disaster". You can make a nice safe target rifle into an uncontrollable FA. Or have the trigger not work at all. "...dry firing the crap out of it to try to work put some of the gritty feeling..." Dry firing doesn't do that. Dry firing is a well known and respected training technique, but it ain't going to fix a bad trigger.
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January 16, 2016, 04:13 PM | #47 |
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As has been said, if you decide you must work on it yourself, do not use files, dremel, or sandpaper. Some say 1200 or higher sandpaper is higher, but I would not use anything but a very fine stone. You must not change any geometry or dimension which is why you're only polishing. You cannot remove or reshape anything, only smooth out the high or rough parts to improve your surface finish and reduce contact friction. Anything else can become unsafe very fast. As stated, there is also the issue of hardening.
I would just spend $60-80 on the ALG and be done with it. You're not ready to work on your trigger yet side you don't have an understanding of how it works. Asking questions is the first step to understanding but it's not a job I think you should try yet. Just my opinion. I've been wrong before
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January 16, 2016, 05:41 PM | #48 |
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For the benefit of the OP, that is a never used RRA National Match 2-stage trigger in my previous post.
I've had it in my parts bin for at least six...maybe closer to seven years. It was intended to be paired up with a varmint rifle upper that I built but wound up selling the upper before I completed the lower. I am asking $75 shipped.
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January 18, 2016, 08:01 PM | #49 |
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Polish the hammer surface and sear surface using a Dremel tool on the LOWEST speed, using one of the cotton disks and some Jewelers rouge. Both surfaces will shine like chrome. That's it. Don't keep grinding. That's it. I have ceramic stones and use them regularly, they are a great tool. But the Dremel will work just fine, JUST DON'T GET CARRIED AWAY. Polish, that's it. Know when to say when. The trigger pull will be smoother and somewhat reduced. I can't imagine you want a "Match" trigger with a 2LB pull on an AR. Good Luck. I hope that helps.
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January 18, 2016, 10:13 PM | #50 |
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That is where I am going to start. Then maybe some springs. Apparently any more than that I just might throw the earth off its axis or plunge the world into eternal darkness or something...lol. Thanks for all the advice folks. It has been helpful. I promise to be careful. No grinders or plasma cutters.
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