Roll pin on bolt keeps backing out

[Gabes]

Hey all,

 

I am currently running a RRA 9mm Bolt in my rifle and, since owning the thing, the pin on the bolt that retains the weight keeps backing out.  I pretty much have to check it between stages to make sure that it doesn't cause me trouble.

 

What can i do about this?  I've already tried replacing the pin but that hasn't helped. 

 

A new bolt?  A pin that i haven't seen before?  I'm all ears.

 

Thank you.

[AHI]

clean bolt and pin( you are using a steal pin)with brake clean then put some Red lock tight on pin 

install and let it set 24 hours.

[Beef15]

If it's a regular split roll pin you can take a chisel or screwdriver and spread the pin some, should be able to make it very tight.

[RickT]

You might get by with green loctite in that application.  That's what I used on my wife's PCC, but it hasn't seen many rounds since.  Have had excellent luck with fixing very, very loose rear sights.

[wgj3]

Another option-

Take pin out and remove the weight completely. Add mass back to buffer or simply leave it a little lighter...

[MemphisMechanic]

If you’re sure you want to stick with the mass longterm, I’d spot weld the pin into the bolt if it were my rifle.

 

Permanent if you don’t do anything to it, but some work with a dremel can still remove it someday if needed.

 

...but then again, I have a rather nice welder in the garage.
 

Edited June 11, 2020 by MemphisMechanic

[TRUBL]

When we get a customer that has a problem child like that......we spot weld both sides. It's rare.....but sometimes it happens.

[Gabes]

I'm going the green lock tite solution first.  If it's still fussy i'm gonna go with spot welds.  Thanks all!

 

FYI: as a good reference for other PCC shooters looking for a replacement bolt weight retaining pin, i've posted the pins i just received and seem to work well.  They feel MUCH tighter than the OEM pin.  This in conjunction with green lock tite should do the trick... i think.

 

U39140.025.0087

41LW72

31163201

 

1/4" by 7/8" Steel Coiled Spring Pin

 

https://www.grainger.com/product/41LW72?cm_mmc=EMT-_-10376092-_-ShippingConf2018NavBar-_-OnlineGuest-KPIRPE-_-Item&RIID=55839993375&GID=&mid=EMT-_-10376092-_-ShipConfirmation-_-Item&rfe=5c1436b92ed1b86042d1e060fc838d5e17c65a0a08f2003302c9ae0f1967d5e1&gcrfe=5c1436b92ed1b86042d1e060fc838d5e17c65a0a08f2003302c9ae0f1967d5e1

 

[ltdmstr]

I would tap it and install a set screw, and use loctite when installing the screw.

[Styro]

I think that's a spring roll pin. Replace with a new one but use the red high strength locktite when you replace it.

Edited June 17, 2020 by Styro