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Dust Cover

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Dust Cover

Postby ModelAUzi » Sat, 17 Mar 2012 21:16:17

I just got a LMT Ar-15 CQB 16. Some times the dust cover won't stay closed. Can it be adjusted?


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Re: Dust Cover

Postby meak99 » Sat, 17 Mar 2012 21:38:55

Under what conditions does it open other than when the bolt is either blown back from firing, or pulled back with the charging handle? Does it just pop open sometimes? Is the detent that holds it closed still tight and under spring pressure?


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Re: Dust Cover

Postby ModelAUzi » Sun, 18 Mar 2012 21:07:34

The bolt is home and when I shut the dust cover with my fingers it pops open sometimes. I could try it with the bolt open and see. It may be hitting the BCK. Thanks for helping. It's a new gun and the spring seems to be ok.


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Re: Dust Cover

Postby ModelAUzi » Mon, 19 Mar 2012 20:54:14

Tried it with the bolt open and now it stays shut. It will pop open with just slight pressure from my finger in the Mag well.


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Re: Dust Cover

Postby meak99 » Mon, 19 Mar 2012 21:15:40

It should stay shut, and then pop open as the bolt moves past - either forward from being released, or back by firing/being pulled back. It can also be popped open with your finger through the mag well... but should stay shut as long as the bolt isn't move past, or you don't pop it open with your finger.


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Re: Dust Cover

Postby ModelAUzi » Mon, 19 Mar 2012 21:21:48

Thanks for the reply. Unfortunately, it does it intermittently.


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Re: Dust Cover

Postby meak99 » Mon, 19 Mar 2012 21:24:37

Then something it wrong with the detent, or the point where the detent is supposed to hold in place. Where'd you buy it? See if they'll fix it. If it usually sits in a closet and you take it to the range every now and then, I wouldn't worry about it. If you want it fixed, check with the seller or manufacturer...


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Re: Dust Cover

Postby ModelAUzi » Wed, 21 Mar 2012 21:09:27

I will. Got it at Quantico Tactical. Thanks again!!


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Re: Dust Cover

Postby grumpyMSG » Wed, 21 Mar 2012 22:21:15

One other possibility to look at is making sure you bolt is all the way forward. If you look at the side of your bolt carrier , there is a "flat" spot on it, as it slides to the rear it contacts the cover (it actually pushes out on the detent housing) bumping it out and opening it. That is when you have the bolt forward. If you look at the front of the bolt carrier that is where it contacts the detent housing when it goes forward. If you ride the bolt forward, it may not go into full battery, meaning it may not allow the cover to close completely and that may be what is happening with your rifle. If you think that may happening, watch the bolt carrier through the ejection port, and tap the forward assist to ensure the bolt is all the way forward. If you have any doubts take it back to Quantico Tactical and let them take a look at it.
Of course it is in the last place you looked, you're not going to keep looking for something after you've found it.


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Re: Dust Cover

Postby ModelAUzi » Fri, 23 Mar 2012 21:28:00

GrumpyMSG, I think you are on to something. I have been riding the bolt home and have not just let it go all the way. I bet that's what's happening. :clap: I'm going to go slap myself now.


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