AR Sponsor
Posted: 2/24/2009 10:44:10 AM EDT
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I didn't do any searching on this topic and I'm sure that this has probably been said before (hopefully not too recently). I installed a Rock River LPK in a DPMS receiver using a little oil on the initial installation. I wasn't expecting this but to my surprise the trigger broke cleanly with virtually no take up and the over travel was quite acceptable. There was no grittiness and the hammer moves in a positive direction prior to release, however it was quite heavy breaking at slightly over 9 lbs.
I had previously purchased the AGI video on AR 15 trigger jobs thinking I would use the information sooner or later, I watched the video again. It is a decent video though it isn't all encompassing. I ended up stoning the rough edges with an 800 grit stone and polishing the principal surface faces and trigger pins with a Dremel, polishing wheel and jewelers rouge using caution on the pins (not wanting to induce any looseness). The surfaces are now mirror smooth though I actually removed very little material. I installed the JP spring kit and greased the appropriate surfaces. I then ran it through 100 or so cycles. The trigger now breaks cleanly at 4.5 lbs. (according to my less than precise fish scale). I have a second target rifle with the complete JP Speed Trigger set up. It is a fine trigger and has served me well for the past 15 years. This new trigger turned out to be exactly what I hoped for, maybe even nicer and compares very favorably with the $180 trigger. It is about 1 1/2 lbs. heavier than the more expensive set up (absolutely appropriate for this carbine's intended use) and is buttery smooth with a clean break to be envied. Originally I had considered removing the trigger hook as if to duplicate the JP Speed Trigger. I opted to hold off on this until I've had a chance to see how it does with a primer in front of it. For those who appreciate a nice single stage trigger wanting to try this kit on their own, I would definitely tell them to give it a try. I think you'll be pleased with the results and at $10 (Brownell's) it's quite a value. If stoning and polishing makes you nervous I would think that even the spring kit on its own would make a favorable difference. I truthfully didn't believe that an OEM trigger could feel this nice. |
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I did this too,but I left the stock hammer spring in it.I wanted to be sure there were not any misfires due to a weak hammer spring Did you try the new spring before making this decision? Unless you were having a problem I think you're missing part of what the kit offers. That said, if you're happy with what you've got no need to keep looking. |
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Good job! Just hold off on clipping the hammer to make sure you have reliable ignition.... I thought "clipping the hammer" was to cure light primer strikes associated with light aftermarket hammer springs. So wouldnt he potentially have unreliable ignition at this point, and possibly need to bob his hammer to resolve the problem? |
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Quoted:
Quoted:
Good job! Just hold off on clipping the hammer to make sure you have reliable ignition.... I thought "clipping the hammer" was to cure light primer strikes associated with light aftermarket hammer springs. So wouldnt he potentially have unreliable ignition at this point, and possibly need to bob his hammer to resolve the problem? That's exactly the potential scenario. My only point is that if it lights the primer off as is, why clip it? |
I did pretty much the same on my brand new ARmalite single stage trigger($35+-) I didn't change any springs or stone, I just got out my dremel buffing kit. Unfortunatly, my abrasive had hardened and nothing would bring it back to life. The clover valve grinding paste seemed to have migrated to my buddys tool box, and the abrasive bore cleaner, rubbing compound, etc didn't seem to be doing the job. The wife only gone for two hours so no time for shopping, what to do? I ended up getting some fine abrasive dry DIRT from the driveway and sprinkling it into the bore cleaner on my buffing wheel. Worked great! I now have mirror polished sear surfaces that break crisp and clean at about 5 pounds No grittyness or creep( carefully cleaned before installation...by the way, who knew that carburator cleaner would disolve nitrile gloves?) Thats's Right! a DIRT TRIGGER! I think I"M cheaper than dirt!
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