Originally Posted by
msedward43
that's good to know. I was just mildly worried about investing in another competing but proprietary system...one of the joys of the carbine system is that I can swap buffers and springs at will across brands and setups. I just didn't want to get into ANOTHER system that would mean I'd have to keep track of another set of buffers that could only fit in the MK2 receiver extensions etc etc etc... when I already have to do that with the A5.
looking at the weights it looks like the Mk2 is basically an A5, just with their own buffer weights (talking to BCM this morning they used the mil-spec tungsten weights ONLY, which is how they got their weights different than an A5...and probably how they got around patent rights)