Rear Takedown Pin Xtra Tight

[monorailboy]

I just completed an AR build and find that the rear takedown pin is so tight, I have to tap it thru both ways to use it.

Before placing the upper on...the pin fit well in the lower.

Any suggestions ?

From a DPMS Pats kit.

Thanks

[kcstott]

Remove the pin. Clamp the action closed and run a .250 reamer through the hole.

[monorailboy]

Thank you !

[jameshenry]

Doesn't anybody recommend shooting it before cutting on it?

[nestle19]

I had the same problem, but the more you use the rifle the looser it will get. I used to tap mine as well.

[monorailboy]

Thanks !! Will try that first

[IEatZ28]

Mine was so bad I had to tap it in with a hammer. But it's getting easier with use


Sent from my iPhone

[kcstott]

Doesn't anybody recommend shooting it before cutting on it?

Really?? Shooting it is going to help the fit??

Two ways to fix it. 1: ignore it and let it wear in. 2: Ream the hole as an assembly cleaning up the fraction of a thousandth of an inch that is causing it to bind.

If the pin is going in but it's difficult to push Reaming will just clean up a very minor misalignment and solve all the issues. If the pin requires a mallet the reamer will fix that as well.


Machined parts will always require minor fitting, Milspec even more.

[jameshenry]

Shooting can loosen up tight pins by knocking down high spots. I think shooting before removing metal is always better.

[kcstott]

And I got a swimming pool full of snake oil to sell you too.

[SVT-40]

Tight=good

loose=bad

[isplice]

Tight=good

loose=bad

Too tight=bad in the field

[Cheep]

Too loose=well you know...

[donmopar]

If tight is bad then AK's must be the most accurate guns built.