JP AR Tension Pin or Alternative

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13 years 4 months ago #7856 by Bringsteen
JP AR Tension Pin or Alternative was created by Bringsteen
My LR 308 had a loose upper/lower fit, so I installed the JP AR Tension Pin. It definitely does the trick. However it shoots loose unless you apply some threadlocker. This is a problem if you are benchresting it and you want to clean the bore regularly. You have to break the threadlocker free and then reapply it once you've cleaned the bore.

My question is whether there is an alternative. There is an AccuWedge for the AR-15, but I see no such product for the AR-10.

Does anyone have a suggestion?

Thanks,

Bringsteen

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13 years 4 months ago #7861 by LebbenB
Replied by LebbenB on topic Re: JP AR Tension Pin or Alternative
A foam earplug.

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13 years 4 months ago #7882 by Bringsteen
Replied by Bringsteen on topic Re: JP AR Tension Pin or Alternative
That's an interesting suggestion. I wonder whether that would tighten up the groups to the same extent that the JP AR Tension Pin has.

Thanks,

Bringsteen

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13 years 4 months ago #7883 by JustMe
Replied by JustMe on topic Re: JP AR Tension Pin or Alternative
How about trying one of these expanding diameter pins from McMaster-Carr. Easy in - easy out.
www.mcmaster.com/#pins/=cuzwhd

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13 years 4 months ago #7891 by Bringsteen
Replied by Bringsteen on topic Re: JP AR Tension Pin or Alternative
That looks like it might be the perfect solution! Has anyone tried it? If they were $20, I would have already ordered one, but they're about $100 and up.

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13 years 4 months ago #7916 by JustMe
Replied by JustMe on topic Re: JP AR Tension Pin or Alternative
Bringsteen,

I guess you could look at $100 as being a lot for the pin, but what is your time worth? A mechanic charges $85+ per hour to work on your car, so using this as a cost basis, it would be worth only 1.5 hours of your time or you can keep struggling with your current method of using threadlocker. How long does it take to keep cleaning and reapplying the threadlocker over and over again each time you visit the range? Obviously, you're frustrated about using your threadlocker method.

Enjoy your shooting more. Invest in yourself and buy the pin. Your wife will eventually forgive you, hahahaha. :-)

Jer

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13 years 4 months ago #7933 by Bringsteen
Replied by Bringsteen on topic Re: JP AR Tension Pin or Alternative
If it were known to do the job, I would've already purchased it. I guess I might need to be the guinea pig. But I can't argue with your reasoning.

What sort of confuses me is that no one else on this site seems to deal with this problem. Does everyone else just have a perfect upper/lower fit on their rifles?

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13 years 4 months ago #7936 by jtallen83
Replied by jtallen83 on topic Re: JP AR Tension Pin or Alternative
"What sort of confuses me is that no one else on this site seems to deal with this problem. Does everyone else just have a perfect upper/lower fit on their rifles?[/quote]
My Armalite is rock solid!

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13 years 4 months ago #7937 by LebbenB
Replied by LebbenB on topic Re: JP AR Tension Pin or Alternative

What sort of confuses me is that no one else on this site seems to deal with this problem. Does everyone else just have a perfect upper/lower fit on their rifles?

I'm an Armalite owner as well and every Armalite I've worked on in the last few years tended to built tight. I'm not trying to be a shill for Armalite, nor am I casting aspersions on other manufacturers, just giving my experiences.

I have to ask - If the rifle isn't grouping to your expectations without the tensioning pin or you suspect that the upper/lower fitment isn't what it should be, have you contacted DPMS about the issue?

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13 years 4 months ago #7945 by Bringsteen
Replied by Bringsteen on topic Re: JP AR Tension Pin or Alternative
There's not an excessive amount of play, but it's enough that the standard pin can be readily inserted and removed, and you can feel some play when putting pressure on the trigger. With the JP AR Tension Pin in, the accuracy does improve. It's accurate without the tension pin; it's even more accurate with the tension pin.

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