Derya MK12 buffer tube size

It is one of the ones where you need to use the point of a bullet to pull down the pin. It was a pain to get on. I was hoping someone here would know before I had to resort to that.
 
I actually broke down before going to bed last night and tested a couple stocks as it seems nobody knows. Really bad day at work, a few beer and fatigue led to embedding the screwdriver I was using in my thumb. After i stopped the bleeding, I found that the commercial sized stock fit best.
 
I actually broke down before going to bed last night and tested a couple stocks as it seems nobody knows. Really bad day at work, a few beer and fatigue led to embedding the screwdriver I was using in my thumb. After i stopped the bleeding, I found that the commercial sized stock fit best.

Ouch! How bad did you stab yourself with the screwdriver?

And in the end, you didn't change out the stock?

Cheers
Jay
 
Was holding the uber and trying to pry down on the pin and it slipped forward and into my thumb. Probably could not repeat it.

At least I know what size to look for if I decide to get another one.
 
I am looking to swap the stock on my Derya. I have a Magpul on my AR and wanted one similar. Anyone know.if it is Milsoec or commercial?

OK, I have done this and it takes a bit of work. First off, even though the Buffer tube on the MK-12 looks the same as the AR10/AR15 it's quite different. On an AR rifle you install the buffer and spring at he back of the lower receiver and the buffer is held in place by a pin. On the MK-12 the buffer and spring are installed from the rear of the buffer tube and there is a larger round nut that holds it in place.
I managed to install my Magpul PRS Gen 3 stock but I had to do a bit of grinding on the front lower angled square part of the buffer tube so the quick disconnect would fit, plus the stock itself was a bear to install. I basically had to use a rubber hammer to get it on, it was really tight, but I managed. Once on it fits really well but it's something that once you install it.
don't try and remove it.
This setup should work work with pretty well any Milspec fixed stock, because the milspec buffer tube is slightly smaller than the commercial one, but since you can't change out the buffer tube you have to find a stock that will fit on the MK-12 buffer tube that comes on the rifle.
That said, I didn't test every stock out there and I'm only posting my experience with trying to install the Magpul PRS Gen 3 stock on my rifle.
 
Last edited:
I just put a Magpul MOE commercial stock on it and it fit about the same as it do on the JR Carbine commercial tube.

Yeah, that's good to hear. I think if the PRS was a commercial type stock my fitment might have been a little easier. Mine was a hassle but it looks really good on the rifle. Was yours basically plug and play or did you have to modify anything?
 
Just thought I would enclose a picture or two with the PRS Gen 3 stock on my Derya.

k0qRYR8.jpg


OrdMeqp.jpg
 
Back
Top Bottom