300blk is a very nice round for the niche it falls into, but it’s usefulness is questionable because of its limitations. That in itself is what makes me think that it’s the perfect round for 2 platforms, the AR and the TC Contender. Realistically a person buying a 300blk is either looking at home defense, deer/hog hunting, or suppressed shooting, or a combination therein. Having a swappable barrel or upper makes the “gun” more usable to step out of that niche and into another than to simply put it away and drag out another gun. It’s something I struggle with having ARs because every upper I have has a lower underneath it, but for guys without that particular affliction you can have a nice or a really great AR and then slap a $400 upper on it and go from one niche to another while keeping your upgraded lower. In a contender it’s as easy as swapping barrels, so again it’s a niche gun with a niche caliber in a niche role, but once you whack that hog in the thick mess you can use the same gun with a different barrel to go handle prairie dogs, or squirrel, or whatever. A dedicated 300blk, not for me. A 300blk hanging around for a quick trip to the deer woods, now we are talking.