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Posted: 3/14/2004 8:27:30 PM EDT
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A few months ago I sent my Bushmaster lower to JP Enterprises to have their adjustable trigger installed. After about 200 rounds or so I noticed the rifle started "doubling" when fired(two shots, one trigger pull) followed by a failure to feed jam. Upon taking the rifle to a gunsmith, the hammer was dinged up after hitting the bolt carrier. When dropping the bolt slowly the bolt carrier would hang up. When the bolt was release by dropping it under full spring tension the bolt would go fully into battery. My 'smith tells me that the trigger was out of adjustment and the hammer needs to be replaced. I have to admit the gun has a DPMS hard chrome bolt carrier and bolt. Do you think changing out the bolt assembly with a factory Bushmaster and putting the stock trigger back in will remedy this? I am done with the JP Enterprises assembly and will contact them about sending it back for a refund as they are the ones that installed it and set it up. I would like a better trigger pull than stock but will not risk these types of malfunctions. Any suggestions? Thanks, Ernieb |
| JP installed my trigger and it is one of the very best triggers I have. There's probably in excess of 12k rounds through it without any problems. Im sorry you are having a hard time. If you feel like you dont want to let JP fix whatever is wrong if thats the problem, I think the Accuracy Speaks trigger is probably among the most durable of all the drop in upgraded triggers. |
| I really liked the feel of the JP Trigger but my gun has to run reliably. I'm going to Blackwater next month for a 5 Day pistol/carbine course and my rifle has to work reliably. I don't want to take a chance of it going down mid-course. I will check out the Accuracy Speaks assembly. Thanks for the info. |
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The JP setup produces the sweetest trigger pull that I am aware of. However, I did have a JP hammer snap in half on one of my guns. JP repaced it instantly with no questions asked. That having been said, I now have JP FCG's in my "play" (range) guns and Accuracy Speaks FCG's in my SHTF guns. Derrik Martin, who owns AS, is a glazed-eyed fanatic about reliability. The AS isn't quite as sweet as the JP but, it's a WHOLE lot better than stock and is rock solid. Luck, SD P.S. If you do go with AS, you'll have to be a little patient with them. Derrik's guard unit got called up and his wife Cheryl is trying to keep the company running until he gets back. |
| I was using the stock Bushmaster hammer but my gunsmith says it now needs to be replaced because of damage from contacting the bolt assembly. He put in an aftermarket hammer and I guess it works fine. Are there differences in length amongst hammers. I just ordered a new Bushmaster bolt assembly and hammer this morning and will put it together tomorrow when it arrives. I'll keep you posted. It seems that my problem is relatively common from some of the posts that I have read here. Just bummed because I really like the feel of the JP trigger. Can't have my gun doubling though. |
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I'm surprised it would have a problem if JP installed it. I had mine installed by my local 'smith and have never had a problem with it. Is it firing once on trigger pull and then again when you release it? If so, then it sounds like your disconnector isn't timed quite right. The "bolt carrier would hang up" is a design feature of the exposed firing pin and notched top on the hammer. It keeps the gun from running full-auto if you take the disconnector out. Here's a link to the JP trigger installation instructions: [url]http://www.jprifles.com/instructions/FireControl.html[/url] They do a pretty good job of describing how to time the disconnector. You might have to replace the disconnector, but I doubt the hammer needs to be replaced. (It may be "damaged" by the bolt carrier, but that won't affect the function, and wouldn't have depended on the trigger anyway.) |
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well, i don't think there was anything wrong with your original hammer. i think the gun smith may have been overly cautious or wanted to make a buck or two. i would send the rifle back to JP and let them fix it. believe me, they will make it good. i know, i have 3. as for Shooting schools... i would get the most basic bullet proof components in the weapon before going to the school. when i go to these schools i have a JP in my primary carbine and a bone stock trigger in my backup. the JP has over 6000 rounds and not a hiccup. but i don't want dying at a school. |
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