I really like the idea. Keep in mind, if these work for the LAR mags, they should also work for the 10 round XCR mags. And anything longer than the 10 round XCR mags in 7.62 seem nearly impossible to find. The ONLY thing I dont like about the prototype is the gap between the mag and the extension. Is there any way to tighten that up? Maybe machine a lip around the whole thing to fill it in? I wouldnt mind it on one of the small sides (if necessary to slide the pieces together when assembling. But on the long sides id want that gap filled.
I would pay $20 for a few of these. 3 at least. If they are white you can probably use RIT dye to dye them many different colors. Or, use Krylon to paint them. I bet duracote would stick also.
I think the best idea of all (for the original product of course) is to machine them so they connect like the mag couplers do. Just sliding together. Seems like the simplest and strongest solution.
The XCR pistol mags have a different profile , and I think a different baseplate configuration as well. I tried interchanging the extensions between the mags, and it doesn't work. If it did it'd look weird anyways. I'll make some up for the XCR mags eventually, just have to get the LARs nailed down first.
Because of the way they attach, you can't put a lip on the front of the mag (the side that needs the most support) and the plastic I use isn't suitable for replacing the baseplate altogether. I'll look into dyeing them, but I should be getting some black and darker grey plastic in the next few weeks.
My goal was just to make a durable, simple, realistic extension to the LAR mags that doesn't require permanent modification of the magazine body or floorplate. It's difficult to add more material to the outside of the mag while maintaining the aesthetics of the whole thing. As they were initially, they worked well for my needs. As kombayotch pointed out, they may not meet everybody's needs.
To secure the extension further, I printed out a couple of parts that clamp to the ridges on the magazine body and screw into the extension. They're pretty sturdy from what I could determine, but that's coming from a non-SR shooter.
I tried to make them as low profile as possible, and made sure not to cover the magazine markings. However, with them attached, the overall weight of the magazine plus extension slightly exceeded the weight of the 5/30 magazine I was using as a model. They don't interfere with inserting/removing the mag from the mag pouch I was using to test them, but they do stick out slightly.
vs.
