With Robarm tooling up to do their own barrels I don't reckon a limited run or mini-group buy on any caliber/chambering would be totally unthinkable. It would cost a few extra bucks over their 'issue' offerings, but withotu the need to offer a new bolt or other caliber specific parts, it would work. In the case of the 6.8x45mm, we're talking about not chambering the .270 barrel for 6.8SPC. There you go. Of course, a royalty to the patent owner too. My :2cents: totally, if that's the case the 6x45mm for me makes more sense to take advantage of better velocity; still a bigger bullet, still formed from 5.56. Yep, Gunner69 made me a convert, just have to clear my plate of my current projects first...
Mickey, got the chance to tinker with both, A1 and then the rebuilt A2 models. It was a point of contention that the rebuilt receivers had the "HK" stamp on them. We'd swap guns for exercises out in the field where we wouldn't be seen and get in trouble of course, but I don't recall much difference. This was at STANTA, not in the desert where I recall the major issues came from. Liked the 85 and loved the SUSAT but you can keep the LSW, it was too long for this short guy!