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Centerfire Rifles - Semiautomatic or Gas Operated Centerfire rifles, carbines and other gas operated rifles.

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  #1  
Old 03-07-2014, 2:47 PM
Darkerthenblack Darkerthenblack is offline
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Default Dpms upper and Tactical machining fit question.

Okay, yes, a noob here but an experience noob that has worked with ARs. However, I have never built one... just maintained.

I recently got the upper receiver and I finally got the lpk today. I put in the pins in to see fit and I got a tick of 1mm of space all around the rear area and towards the magazine catch. This is not good fitment in my opinion. I am not crazy, right?

I hope pictures show what I mean.

I got the receiver on weds of this week. So, I haven't been with it for long and I think I need to return it early next week.
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  #2  
Old 03-07-2014, 2:55 PM
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vlady vlady is offline
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While it's not abnormal on forged upper and lowers, you maybe able to fix some of that. How is the rear take down pin fitting?
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Old 03-07-2014, 2:57 PM
tal3nt tal3nt is offline
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Perfectly fine. I have one with at least a 2mm gap at the rear. As long as the buffer makes contact with the rear of the carrier when you attach the upper to lower, you should be gucci

Last edited by tal3nt; 03-07-2014 at 3:02 PM..
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Old 03-07-2014, 3:03 PM
Darkerthenblack Darkerthenblack is offline
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Quote:
Originally Posted by vlady View Post
While it's not abnormal on forged upper and lowers, you maybe able to fix some of that. How is the rear take down pin fitting?
the rear take down pin slips in like a knife through butter... A room temperature knife through chilled butter.

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Originally Posted by tal3nt View Post
Perfectly fine. I have one with at least a 2mm gap. As long as the buffer makes contact with the rear of the carrier when you attach the upper to lower, you should be gucci
Yeah, I think the buffer will make contact. The around around the buffer tube is a lot tighter than the other areas.

I forgot to mention the Ar is a 308

Last edited by Darkerthenblack; 03-07-2014 at 3:06 PM..
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  #5  
Old 03-07-2014, 3:13 PM
b18bturboek9 b18bturboek9 is online now
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Looks like the rear cut on the lower is cut alittle to much but i doubt that will cause any problems. I have a ar15 setup with a small gap like that and functions perfectly fine. Check it after a bunch of rounds go down range and see if there are any problems. I wouldn't worry much about that unless ur picky about the look of it.
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  #6  
Old 03-07-2014, 4:29 PM
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kalieracer kalieracer is offline
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100% normal and to be expected when you mix mfgs for parts. There should be a little gap anyways.
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Old 03-07-2014, 5:30 PM
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dyson dyson is offline
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Looks good
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Old 03-07-2014, 9:34 PM
Syds Grandpa Syds Grandpa is offline
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I'm a machinist and I desperately need to know, when I'm Tactically machining, should I wear Body Armour?
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Old 03-08-2014, 6:32 AM
hardlyworking hardlyworking is offline
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Quote:
Originally Posted by Syds Grandpa View Post
I'm a machinist and I desperately need to know, when I'm Tactically machining, should I wear Body Armour?
Night vision and a gas-mask or you are a *****.

*****!
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  #10  
Old 03-08-2014, 7:20 AM
Clipper Clipper is offline
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Looks normal.
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