AR Sponsor
Posted: 1/19/2010 3:33:19 PM EDT
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I recently had the opportunity to hold a few custom made AR's. On all of them the upper was mated tight with the lower. I mean there was NO gap or wobble in there at all. I bought a Bushmaster Carbine about 10 years ago and the upper does not fit that well on the lower. I can move the upper on the lower a little. Is there some way to eliminate this movement and gap? Is this even an issue?
Thanks |
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I don't know if these work but if the play really bothers you you can try them.
accuwedge |
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Thank you. Im game for trying it. Has anyone else had any experience with the Accuwedge? |
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Non-issue. Thanks for the response. Is there anything that can be done to fit this better, or is it just a characteristic of this particular rifle? I had a Bushy that was loose like that. I know exactly what you are talking about. Does it have you thinking, "Does it really need to be THIS loose?" rattle rattle rattle? Tactical Machining makes a nice fitting lower. They have fit well for me with Bushmaster, Colt 6940 upper, TM upper, and Colt 16" lightweight upper. A little too tight at first, but they tend to loosen to perfection after a range trip or two. Or you can try an Accuwedge. Never tried one, but I assume it would tighten up the fit somewhat. Good luck. ETA: See disclaimer.... 
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Quoted:
Thank you. Im game for trying it. Has anyone else had any experience with the Accuwedge? Yes. My CMMG had a little play I found annoying. I popped an accuwedge in the lower and the play is gone. Some folks go cheap and use a foam earplug, but i doubt it would hold up long. Also, quite a few folks use the o-ring method. I'm not sure how it's done, but I'm sure someone can elaborate on how to do it. |
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Quoted:
Quoted:
Quoted:
Non-issue. Thanks for the response. Is there anything that can be done to fit this better, or is it just a characteristic of this particular rifle? I had a Bushy that was loose like that. I know exactly what you are talking about. Does it have you thinking, "Does it really need to be THIS loose?" rattle rattle rattle? Tactical Machining makes a nice fitting lower. They have fit well for me with Bushmaster, Colt 6940 upper, TM upper, and Colt 16" lightweight upper. A little too tight at first, but they tend to loosen to perfection after a range trip or two. Or you can try an Accuwedge. Never tried one, but I assume it would tighten up the fit somewhat. Good luck. ETA: See disclaimer....
Yeah, you hit the nail on the head with "does it really need to be THIS loose''. Ill keep the Tactical Machining in mind if i go with a new lower for my Bushy upper.Thanks for the heads up!! |
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I used an accuwedge in one of my builds because there was a little play in it. It works fine. There is another method where you can get an o-ring and put it around the front lug on the upper and it will tighten it up, I haven't tried this and am not sure what size o-ring to use. Most recommend this method because you're not introducing anything foreign into the lower receiver. |
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Quoted:
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Thank you. I'm game for trying it. Has anyone else had any experience with the Accuwedge? Yes. My CMMG had a little play I found annoying. I popped an accuwedge in the lower and the play is gone. Some folks go cheap and use a foam earplug, but I doubt it would hold up long. Also, quite a few folks use the o-ring method. I'm not sure how it's done, but I'm sure someone can elaborate on how to do it. I would love to know more about the O-ring method. I have plenty of them. I also have access to machining equipment at work. I could make and fit some Delrin or UMHW pieces if I knew exactly what and where the shimming is usually done at. |
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I used an accuwedge in one of my builds because there was a little play in it. It works fine. There is another method where you can get an o-ring and out it around the front lug on the upper and it will tighten it up, I haven't tried this and am not sure what size o-ring to use. Most recommend this method because you're not introducing anything foreign into the lower receiver. Thanks for sharing your experience with the accuwedge. If i cant get any definite answers on the O-ring Method, I will get an Accuwedge. |
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It's not an issue at all and it never has been. It's inherent in the design. When two parts that pin together each have a tolerance range you are bound to have some that fit tighter and some that fit looser. I dont find it to be an issue, its more of a nuisance to me. After handling some quality built AR's I have seen that the Bushmaster doesn't fit as tight as I would like. Thanks for your response! ETA: Spellcheck
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Thanks
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