TNW Firearms Presents The Aero Survival Rifle, famous for its removable barrel and easy caliber changes. The ASR is on on another level because its the only PCC available in 5 different calibers. Available in 9mm, .40S&W, .45ACP, 10mm and .357SIG, the ASR is the most versitile gun on the market. If its for home defense, backpacking, boating, and back country flying the ASR is sure to fit your needs.