DIY .308 XCR 10 round pistol mag coupler
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Thread: DIY .308 XCR 10 round pistol mag coupler

  1. #1
    Newbie kanne54's Avatar
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    DIY .308 XCR 10 round pistol mag coupler

    Check it out. I was starting to get a little frustrated with not being able to buy a coupler for my 308 10 round pistol mags, so....
    2.5 hrs work
    Chunk of aluminum
    Only tools used were hack saw and a file.
    Will have it and the mags cerokyoted magpul OD green next week.
    DIY .308 XCR 10 round pistol mag coupler-xcr-mag-coupler.jpg

  2. #2
    XCR Guru TexasChris's Avatar
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    Nice......need more pics though.
    Do what you've always done, get what you've always got. ----- Have gun. Will travel.

  3. #3
    XCR Guru WatchoutforStobor's Avatar
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    A file and a saw? You are one patient guy. How about a pic in the rifle?

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  5. #4
    Newbie kanne54's Avatar
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    Here is the rifle. Im really happy with it, Its a solid 1 moa or better at 150 yards (havent had a chance to shoot farther yet) One thing that has been bugging me though is that that fore grip/bipod by fab defense is quite a noticeably different green than the magpul parts. I ordered them all in od green though. The FAST stock is going in to be cerakoyted magpul od green with the mags. Can the fore grip be cerakoyted to? Its made of some kind of polymer or plastic.
    Not a whole lot of patients envolved really went alot quicker than I had expected. I used a chunk of aluminum that I had laying around so cutting the basic shape out took the bulk of my time. If I was to repeat I would probably buy a cut piece of aluminum that more closely matched the dimensions of the coupler and maybe save myself a couple of the longer cuts. I originally did a cad cam drawing of a really nice one that was angled to give the final product a closer match to a 30 round mag. But the machine shops I went to all wanted $500 or more to make it. I got one quote for $1000. It took me far longer to do the cad cam design than actually just make this. The cad cam software, that took some patients. Anyway heres the rifle and it looks great attached.

    DIY .308 XCR 10 round pistol mag coupler-img_20150203_122640.jpg
    Last edited by kanne54; 02-04-2015 at 06:01 AM.

  6. #5
    Marksman scalton's Avatar
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    plastic or polymer can be cerakoted, rubber not so much
    Walking through the waste land formally known as the USA

  7. #6
    Newbie kanne54's Avatar
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    Thanks, good to know. Ill send it in with there rest then and leave it up to the guy doing the job.

  8. #7
    XCR Guru WatchoutforStobor's Avatar
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    Looks good you did a great job on this.

    Now that you have the CAD, you could have a machine shop whip them out 25 or 50 at a time and sell them. I bet they would be a hit in Canada.

  9. #8
    Newbie Judge Dredd's Avatar
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    I was considering drilling two to four holes in the floorplates and cut a piece of 100 hardness rubber (the kind used for shopping cart wheels and whatever) to the dimensions of the mags in the shape of a door-stop, and drill through them. Bolt them together, slide the mags onto the attached floorplates (hard squeeze getting under the hard rubber) and presto. Nuts sized or positioned to not interfere with follower.. or even can trim the edges slightly so it isn't a hard squeeze to slide them back in place.

    Ideas?
    Last edited by Judge Dredd; 02-24-2015 at 03:25 PM.

  10. #9
    Newbie kanne54's Avatar
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    No reason that wouldn't work. There is probably a better material that is also easy to work with like maybe abs plastic or acrylic. I was just thinking with rubber you might have some issues with threading the screw holes. I think aluminum might be the best material for the job though, as well as being the more durable longer lasting material. It would work out better it just takes a little bit of elbow grease to make the longer cuts with a hack saw.

  11. #10
    Newbie Judge Dredd's Avatar
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    Quote Originally Posted by kanne54 View Post
    threading the screw holes
    Actually I was thinking the hard rubber would be drilled and not threaded at all. Using it like a spacer, with nuts and bolts securing the floorplates to eachother.

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