thefirearmbog.com offers a sneak peak at an experimental rifle with enough picatinny railage to hang all of your Christmas ornaments. The Taiwanese AR-style XT100 is chambered in 6.8 SPC caliber. Our esteemed colleague reckons “6.8 SPC is slowly gaining acceptance outside of the United States, where sadly it has not been adopted by the special or conventional forces.” While Sharp As A Marble’s a big fan, and the rabbi’s go-to gun is chambered in 6.8 SPC, the cartridge is about as popular as that guy in high school who mastered COBOL. Who went on to make millions. Does 6.8 SPC have what it takes for a come-from-behind victory over ARs chambered in panty-waist .223 (5.56)? Just kidding. I heart my FN SCAR. But do you heart 6.8 SPC?