I saw one of these Browning BAR 300 win mag rifles converted into a Tactical Beast. Has anyone seen or heard of Who would do a custom conversion.....
I'll have to let other more knowledgeable people weigh in on this one... I like the way it looks in your avatar...
EDITED to correct my flawed recollection. I believe that to be an Arms Tech SMIR. Arms Tech Ltd is in Phoenix, at around Central and Camelback, last I knew. The bottom photo in your post is the stock photo on their website, I believe. The rifle is a 300 Win Mag, and I _think_ they remove the gas system, making it essentially a straight-pull bolt gun. I may not recall that part correctly, however.
I was wrong, they retain the gas operating system (so it's still a semi-auto BAR). Not available at present, though. http://www.armstechltd.com/articles/article_SMIR.pdf