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Posted: 10/29/2009 6:33:47 AM EDT
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Just for fun I picked up a stripped RRA lower and a DPMS parts kit. Upon assembly I found the DPMS pistol grip would not fit the RRA lower so I bought a Hogue grip which fit fine. Remainder of the little parts and springs went in fine with no scratches to the finish.
All of my AR 15 type trigger time is with RRA ARs that I got as complete rifles with their 2 stage Fire Control Groups. The DPMS parts kit trigger or FCG is horrible! Is that what is called a mil-spec FCG? Today I am going to take the newly assembled lower to the range for testing useing my carbine upper. Dry firing with a Zoom snap cap reveals a little take up then creep and a relatively heavy pull compared to the RRA trigger. Is this what I can expect from this type of FCG? I'm thinking about degreasing the FCG and putting a dab of IOSSO on the sear area to polish it up during firing. IOSSO is mechanical bore cleaner that also works great for polishing metal like aluminum.There is no grit in IOSSO. What do you think? Maybe I should remove the FCG and use some emory on it? If I booger up the sear surface I do not care because I doubt I will be able to live with it anyway. The ultimate purpose for this lower is to mate a dedicated .22LR upper to it. Any recommendations for which dedicated .22LR uppere to get? Thanks For Your Time -VonBarky- |
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there are relatively easy mods you can do to improve your trigger.
9th post from the top i will be doing this this weekend. |
| You could always sand the engagement surface starting with 400 and working you way finer. Just make sure you be care and use a flat surface. I took sandpaper and spray glued it to a piece of sanded plywood and very carefully work the trigger on it. Now it's smooth as butter and feels lighter although its the same pressure spring. YMMV |
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The trigger in my daniel defense LPK was gritty so I just polished up all the contact surfaces with a mild rubbing compound and cleaned/lubed the trigger and now its got a nice smooth but firm break to the trigger which is what I expect out of a .mil type trigger.
I'd try this before going as far as stoning the contact surfaces but you may very well have to do so. |
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Yes, the mil spec triggers suck. I polish mine with a 600 grit stone, which helps quite a bit. Depending on the application I might put in a JP reduced power spring kit, which also helps. Bill Springfield does a good job, I've been thinking about mailing a couple of mine to him. Its still not going to feel as good as the RRA two stage. |
| Um..like what somebody else said....you are comparing RRA 2 stage with a basic DPMS basic trigger. Two diff type triggers so they are going to feel diff. There are several things already posted here you can do to improve it or just put a RRA 2 stage in it ince you are use to these. |
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GI triggers aren't supposed to be butter smooth and light as a feather. But they shouldn't be gritty, either. I grease the trigger and hammer pins when I assemble the parts, and that helps a lot. So does cycling the trigger and hammer a lot-that means putting a bunch of rounds downrange in trigger drills (a .22 adapter is great for this).
Plus, Bill Springfield does really wonderful work. I just got a LPK from him that I will be assembling today-I mailed my check on Saturday and the kit came in on Thursday! He has not replied to my emails, but he DOES answer his phone, so CALL him. He's on Mountain Time, and his web site says he's available pretty much all day Saturday... |
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