How to Pin a Collapsible Stock On a Rifle

Learn how to easily pin a collapsible stock to satisfy the Assault Weapons Ban (AWB) criteria with a drill, roll pin, and epoxy.

Note the disclaimer that this is for educational purposes only and that you should double-check all laws surrounding this.

Tools Needed

Pinning a Collapsible Stock

I'll be pinning my Bravo B5 stock ($60) but this should translate to any adjustable polymer stock.  I like the B5 since it's really light and has that angle that gives me a really good cheekweld.

First make sure that you have your stock in the correct length.  So if you have any optics (Best Scopes & Optics for the AR-15), make sure you have proper eye relief and length of pull.

Get a matching set of drill bit and roll pin.  I'm using 1/8" for both since it looks pretty thick and should stand up to some abuse in the rare chance that my collapsible stock tries to move.

Use a hand drill or drill press to drill the stock and the bottom part of the buffer tube.

Make sure to not drill through the entire buffer tube.  You want to just clear the first wall.  Reason is we want to make it a "blind" pin so you can't just knock out the roll pin from a hole on the other side.

You might have to trim the pin depending on the initial length.  But make it so it will fit all the way to the wall of the buffer tube and be near flush with the stock.

I just used a pair of wire cutters.  But you can see that mine is a little too long for taste so I added some liberal force with a punch.

Mix up some epoxy and put it over the hole.  Since the roll pin is hollow you might have to reapply so that there's actually epoxy over it.  And...you're done!

Here's a video of the process too:

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Alternatives to Pinning Your Stock

Something new has come along...the Stock Lok ($35).  It swaps out the adjusting pin in your stock so that it becomes fixed.  Perfect if you don't want to pin after reading this tutorial.

An even easier method is with Strike Industries Stock Stop which is a piece of rubber that stops your standard buttstock from moving.

Genius and super cheap at under $10.

Strike Industries Stock Stop

Conclusion

Looking for more help in building a featureless rifle or upgrading your AR-15?  Check out our AR-15 Resources and How to Build a Featureless AR-15.