very tight take down pins.....any long term issue?

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HawkWei

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Hi guys, I am putting a 7.5 inch upper to a different brand lower reciever, I notice the takedown pins are very hard to push in. (I had to use a hammer to get them in and out). I figure that's because either the upper or the lower is a tiny bit out of spec.

The rifle cycles fine of course but with such tight pins will there be any wired pressure on the contacts points that might cause some bad damage?

Thanks guys.
 
HawkWei said:
Hi guys, I am putting a 7.5 inch upper to a different brand lower reciever, I notice the takedown pins are very hard to push in. (I had to use a hammer to get them in and out). I figure that's because either the upper or the lower is a tiny bit out of spec.

The rifle cycles fine of course but with such tight pins will there be any wired pressure on the contacts points that might cause some bad damage?

Thanks guys.
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It will loosen up at a few thousand rounds as some AR's become very sloppy with extended use.
 
Be careful when using a hammer. If the front pin is binding with the detent, a hammer blow can snap apiece off your lower.

Is it binding at the beginning or the whole way through?
 
Dsiwy said:
Be careful when using a hammer. If the front pin is binding with the detent, a hammer blow can snap apiece off your lower.

Is it binding at the beginning or the whole way through?
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They are more tight at the beginning and in the middle..... I use hammer but not a powerful blow more like multiple light tap (magazines will do the job as well)

The front ping is easier to push in (if I use full force I can use my thumb to push the front pin all the way in), the back pin is more tight at this moment.

Well, at lease my upper and lower does not wobble at all for now. Do you guys see any huge potential issue with this? If not I might just leave the set up like this......
 
I have seen a few tight C8s at work and never seen it cause a problem, so you should be fine. Plus the accuwedge makes them super tight and the CAF has never had an issues caused by this.
 
I used to have to use a punch and hammer to takedown my CC IUR complete rifle. Now after a couple thousand rounds and multiple takedowns I just need a hard object to start the takedown pin out.
 
bsand said:
I used to have to use a punch and hammer to takedown my CC IUR complete rifle. Now after a couple thousand rounds and multiple takedowns I just need a hard object to start the takedown pin out.
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same here, except still at the hammer and punch stage since i only put about 200 rounds through mine
 
HawkWei said:
Well do you use any tools at all? I mean I don't have to use a hammer but I need something like a magazine at least to tap on the pins.
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The front pin can be pushed in with my thumb but to push it out I use a cleaning rod. For the back pin, I can push it 90% in but need something to tap it all the way in like a magazine or I usually use a spent casing and tap it with my knife and it need some help to push it out but one I can grab it with my finger I can pull it out with some resistance.

This rifle has no slopiness at all, much like the C8 at work that still have the accuwedge in (most of us toss it)
 
Too tight could propagate stress fractures to the hole, but firearms and good machinery tend to be designed with softer added parts versus something that will damage the immovable part. If you are very worried, get a second set of pins and sand off the rough Parkerizing.
 
I have an 80s vintage Olympic Arms rifle that for years needed to have the rear takedown pin tapped out with a punch and hammer. It saw at least a couple thousand rounds and never got any better or any worse. It didn't cause any problem aside from the inconvenience.

I did eventually enlongate the takedown pin hole on the upper, just because I feel it was intended to takedown without tools, it should work as intended. It now fits properly to anything I have tried it with.
 
I had this issue with my IUR. If you have the accuwedge that might be what is making it so tight, I took mine out and they push out easily now.
 
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