I believe Penguin is right about the AK-USA brakes. Isn't the AMD65 bbl. 12.5" or so? There's a guy who posts at the AKFiles going by Moses with an awesome looking AMD65 style extended brake for about fifty bucks. (It's a nice looking unit, I've actually considered buying one for an NHM91/RPK project just for a Koooolness factor!) What I like about the K-var bbl. assy. is the fact that you can use standard handguards unlike a krink. The 16" bbl. krink kit K-var offers looks kinda funny, (not that I'd be a gun snob if someone here were so gracious as to let me try theirs) it just seems the sights might not be optimum for accuracy without some sort of optic.