AR Sponsor
Posted: 3/14/2010 2:14:24 PM EDT
| I just got a new AR-15 last week, so sorry for the ignorance. It is a Bushmaster Patrolman's M4. Is it common to have a little play between the upper and lower receiver? It's not much at all, but it is kind of annoying. Is there any fix? |
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Should have got a RRA. No play at all in mine. RRA marketing scheme. They make an accurate rifle, yes, but they've convinced people it's desirable to have to bash their gun together with a rubber mallet. Play in the receivers and normal, and desirable. This ensures interchangeability with different uppers. There is nothing wrong with your rifle. Don't buy any ancillary crap to "fix" a non-issue. Do not modify your weapon to fix a non-issue. I have yet to own an AR without play in the receivers. I've owned Bushy, Colt, LMT, and BCM. |
| Completely normal to have some play between the upper and lower receivers. Some manufacturers build there rifles to tighter tolerances so there will be no play, such as RRA and Sabre Defense but most have some play. My LMT, BCM, Larue Stealth, S&W M&P15, and DPMS all had some play between the receivers. Some had more play than others but it never effected their operation. As was stated above, they are built that way to ensure interchangeability between uppers and lowers. Keep in mind that a little play is normal but I have seen some AR15s where the amount of play was excessive. |
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Thanks everyone! There doesn't seem to be a problem with accuracy so I'm not to worried. Is there a possibility that it could get any worse? I will probably avoid the epoxy on my rifle. It seems to be self-limiting, non have mine have gotten looser in thousands of rounds. |
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Should have got a RRA. No play at all in mine. RRA marketing scheme. They make an accurate rifle, yes, but they've convinced people it's desirable to have to bash their gun together with a rubber mallet. Play in the receivers and normal, and desirable. This ensures interchangeability with different uppers. There is nothing wrong with your rifle. Don't buy any ancillary crap to "fix" a non-issue. Do not modify your weapon to fix a non-issue. I have yet to own an AR without play in the receivers. I've owned Bushy, Colt, LMT, and BCM. I used to have a Daniel Defense M4 with super tight upper and lower fit - I had to use a punch and tapped it to push the rear take down pin out. Did not like it at all. Then I got myself a Daniel Defense XVII with some play (more so than most AR's I've owned actually) between the upper and lower - I noticed ZERO difference in accuracy and reliablilty between the super tight DDM4 and the sloppy Joe DD XVII. |
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it is normal but can be a pain of it is excessive. The .05 O ring fixes it up nice n snug. I use an O-ring on one of my ARs. Better than an accuwedge and a hell of a lot cheaper. For those of us who do not know - O-ring - where? I have no wiggle, just curious. Thanks |
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it is normal but can be a pain of it is excessive. The .05 O ring fixes it up nice n snug. I use an O-ring on one of my ARs. Better than an accuwedge and a hell of a lot cheaper. For those of us who do not know - O-ring - where? I have no wiggle, just curious. Thanks The front hinge post on the upper, I think. |
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Should have got a RRA. No play at all in mine. Oh yeah, right, should have bought a rifle from a manufacturer that takes several shortcuts resulting in an inferior product that doesn't meet the TDP is many areas just so that you can use a mallet to break the upper and lower apart. 
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Should have got a RRA. No play at all in mine. Yeah, plus you get improperly staked keys, loctited castle nuts, straight as opposed to taper pins on the FSB and other freebies! Dude, tight fit between the upper and lower doesn't fix anything or mean better accuracy. It just means they are harder to separate. |
| My Colt fits together so well I can't even see the break between the upper and the lower. It's like the upper and lower were hand matched, a perfect marriage of form, function, beauty and reliability. The only movement is a gentle rhythmic sway like water in calm weather lapping the shore. Like two lovers in perfect sync.. |
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it is normal but can be a pain of it is excessive. The .05 O ring fixes it up nice n snug. I use an O-ring on one of my ARs. Better than an accuwedge and a hell of a lot cheaper. For those of us who do not know - O-ring - where? I have no wiggle, just curious. Thanks The front hinge post on the upper, I think. It goes here. Use one with approximately a 1/32 to 1/16" cross-section. Thicker than that and it may get cut when you close and pin the upper. 
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