First time I have seen this...
Might be handy to carry in bear country, if you can hit with it. Matches or exeeds the S&W 500 balistics, but in a semi auto.
Also saw a BFR chambered in this on gunblast.
How bout that for a companion gun set...
AR15 rifle shooting 400grn slugs at 1900fps with a 12 round mag, and a revolver on your hip that shoots the same ammo!
Seems kinda cool. Pretty cheap too. May just have to pick up a Beowulf upper for my ar...
MN