Hey guys,

I finally got around to doing this mod.  I've had the parts sitting around forever and finally had an A2 stock body arrive for my build.  Downside with that is the A1 and A2 stocks don't have QD swivels unless you buy the expensive KAC stock or the goofy adapter.  For $20 and 10 minutes of work, here's how you do it.

Also, don't be an excitable idiot like me.  Measure twice, drill once per side.  I got mine in, but they are slightly off from each other.  

What you'll need:

-Grovtec GTSW-295 threaded cup and swivel set ($12 or so on Amazon)
-1/2" drill bit
-1/4" allen wrench
-two part epoxy or JB Weld (I used Locktite 3000# two part)
-razor blade

OPTIONAL- flat nut to fit acme thread on the QD cup.  I didn't think I'd need it, but if anyone wants extra security, go for it.

Dismount and disassemble your stock.  Locate where you want your swivels to go.  Personally I based mine off the VLTOR clubfoot I was taking off the rifle.  Cover back of the stock with masking tape to prevent chips, and mark the spots you want the cups installed.

Take your 1/2" bit and align it over the spot at a 90% angle to the curve of the stock and drill.  If it is a solid stock, mark the depth of the cup on the bit with some masking tape.  If it's a hollow A style, just go through.

Route out the holes a bit more since the cup is a hair over 1/2".  I just put the bit at a 75 degree angle or so and rotated it around the hole.  Upside is this takes some of the foam out from the inside of the stock as well.

Test thread the cup into the hole you drilled.  If you need to open it up a hair go for it, just slow and stead on that.  You want the threads to grip.

Clean up any rough spots with the razor.

Once you can thread the cup in easily, you are ready for final installation.  Mix your epoxy and coat the inside of the hole with a thin layer before screwing the cup back in.  The allen wrench helps get the cup nice and snug in the hole.  

Fill in/around the cup inside the stock, making sure to coat the threads and get into the V shaped hole in the foam around the cup.  DO NOT get epoxy into the hole in the back of the cup.  This will also make a V shaped plug of hardened epoxy to support the cup under stress.

Do the same outside of the stock to fill in any gaps.

Let set, reassemble, and enjoy.

It would be 10,000 times easier to buy the Noveske sling swivel mount.

http://www.noveske.com/products/flush-qd-sling-mount

I didn't know they made those.

No worries. Looks like you did a good job.

Very similer to how I did one of my 607 stocks.  I'm a machinist and cheap bastid, so I machined my own QD socket and backing plate that goes inside the stock.

Dude, that is freaking beautiful

Thanks NP..........and great write-up on your part. I always like to see projects and write-ups that others have done.   There's lots of ingenuity lurking within these forums.

Thanks  Although RTDCU (I think is the letter order) 's build threads just blow me freaking away.  Dude is a mechanical genius.  Some of the folks here just amaze me.

I did this. M16 QD Mount

Nice rifle, what length is the barrel?

Topic Moved

It's a 10.3 DD 300BLK............sort of a cousin to my CQBR, but everything black.

Here's a mapul ACS-L I did with the Noveske, it worked out nicely as the nut winds up in the compartment. Your method is sound too and works well, I'd likely add a nut to the backside of your Grov-tec's purely for hard pull out prevention.  I've used the GT's couple of times on hollow plastic stocks with no problems, but I've mostly used them on wood/laminate stocks, where I tap&die the wood and then epoxy and screw them in and they won't ever move.



And the IWC QD Micro Flush mount usually works well too within it's needed dimensions, and would likely work on the fixed stocks easily.
IWC QD mount

I've gone through and made a 'puck' of epoxy around the cups to make sure they don't budge. If I'd thought of it before hand I would have though. The how to was an after the fact idea.

Things to remember though

tag for potential bolt action rifle stock modification.....

They do threaded and 'ringed' ones that have grooves for adhesive that both work great.