A look at their web site seems to hint at a future X-10.
Not positive but, I hope that it will be for the Armalite AR-10.
If not, maybe their drum for the M1A could be modified to work.
I'm not eager to start hacking on a $300 Drum though.
The only thing that an M1A/M-14 mag needs to hang and feed in an AR-10 is the right sized hole cut in the right spot for the mag catch. It also needs some of the back trimmed down to allow the bolt to go through. What happens at the last round depends on the implementation. The follower on the AR-10 mag has a tab that lifts up the BHO on last round. The M1A mags need the custom follower that the Gen I Armalite Mags had, with a button that pops out as it clears the top of the mag.
So, for the X-25, it's an open question as to what happens on the last round, would have to see the implementation. Might end up not being able to do last round BHO on the AR-10 with it converted.
I've bugged them about a version for the AR-10, here's hoping (especially seeings how they keep throwing the AR name around with 308)!
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