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Posted: 3/21/2013 11:39:33 AM EDT
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Immediately after the Sandy Hook shooting I ordered a Black Rain billet lower, a Wilson-Rogers buttstock, and a CMMG parts kits with the two stage trigger kit. Been sitting here for awhile now. I had shoulder surgery a week ago today and though the other day that I'd put it together. Once done I took it outside for a testfire. I mounted an older, proven upper in 5.56, loaded a 20 round mag and fired one off. Shit, couldn't get the next round off. After a little checking I found if I took my finger and touched the trigger it would reset. So it was like fire a round, push the trigger, fire a round, push the trigger....you get the idea.
Anyway, fast forward to today. I took the trigger out today, looked it over and re-installed it. Test fire was the same. Can someone suggest what I'm doing wrong? Thanks. |
OK, I'll mess with it some more. I used to have a spare RR 2 stage, but when I got another guy interested in ARs, he bought one but the trigger was trash. Sooo, I traded out his old trashy single stage and put my extra 2 stage in. Made a hell of a difference in his gun. Might try trading some springs around. I love this 2ST, smooth and brakes clean, just doesn't reset.
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Would help to know which brand two stage trigger and it if is adjustable or not (or if the install requires tuning).
As for if the pushing the trigger forward by hand, or setting the selector from fire to safe to fire rests the trigger (allows the disco to release the hammer to be caught by the trigger primary sear), sounds like you did not dry fit parts to pins to check for burs, nor checked the sear edges for burs before installing parts, and to rub salt in the wound, either have springs installed wrong or did not CLP lube the parts/pins before installing the FCG. |
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Quoted:
Would help to know which brand two stage trigger and it if is adjustable or not (or if the install requires tuning). As for if the pushing the trigger forward by hand, or setting the selector from fire to safe to fire rests the trigger (allows the disco to release the hammer to be caught by the trigger primary sear), sounds like you did not dry fit parts to pins to check for burs, nor checked the sear edges for burs before installing parts, and to rub salt in the wound, either have springs installed wrong or did not CLP lube the parts/pins before installing the FCG. Well your partially right. Since I bought the parts kit from CMMG I don't know who made it. Them maybe? And nope, other than an eyeball inspection I didn't sand, mill, polish, any parts. I did lube them and then put them in. Oh, and it's been 30 years since I disco'd. Still got the clothes, ugly things....... |
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Pull the FCG, dry fit the pin to the trigger to check for side C burs, give both the disco and hammer sears quick pass with your finger nail to check for burs, and would bank that between the two, going to find the problem of why the trigger will not return on it own to the home position.
If you are a bust on these two, then double check when you install the trigger that is not too wide for the receiver and binding of the sides of the void, the trigger shoe is not binding on the trigger slot cut out in the bottom of the receiver cavity void, and at the same time, make sure that the tail of the trigger is not binding up on the selector U slot sides. And yes, lube the every loving piss out of the trigger channel and the trigger pin to weed out friction there (again, to make sure that the trigger and disco freely rotate on the trigger pin both out of the rifle, and installed. P.S, nothing is drop in an a Ar rifle, even if the bag states such. You still have to give the parts a once over before installing them, or your at the mercy of the parts mating in/ wearing off any milling burs on their own through live fire. |
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Quoted:
Pull the FCG, dry fit the pin to the trigger to check for side C burs, give both the disco and hammer sears quick pass with your finger nail to check for burs, and would bank that between the two, going to find the problem of why the trigger will not return on it own to the home position. If you are a bust on these two, then double check when you install the trigger that is not too wide for the receiver and binding of the sides of the void, the trigger shoe is not binding on the trigger slot cut out in the bottom of the receiver cavity void, and at the same time, make sure that the tail of the trigger is not binding up on the selector U slot sides. And yes, lube the every loving piss out of the trigger channel and the trigger pin to weed out friction there (again, to make sure that the trigger and disco freely rotate on the trigger pin both out of the rifle, and installed. P.S, nothing is drop in an a Ar rifle, even if the bag states such. You still have to give the parts a once over before installing them, or your at the mercy of the parts mating in/ wearing off any milling burs on their own through live fire. I'll give those suggestions a try, thanks. |
Well, I pulled the trigger group out, fired up the dremel, ground some parts off and now it works fine.
Just kidding. I did pull the trigger group, and polished the surfaces glass smooth. Works like a charm now. I actually like this trigger better than my Timney trigger in my 6.5 Grendel. |
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