The Aero Survival Rifle famous for its removable barrel and easily convertible caliber changes is a winner in home defense backpacking boating and back country flying. The Aero Survival Rifle is available in hard black anodize OD Green and Dark Earth. The ASR can be ordered in 9mm .45 ACP .40 10mm .357SIG calibers and the newly available .22LR and 460 Rowland. The ASR is also coming soon in .22 MAG and .17 HMR. The ASR is equipped with a quick change barrel and AR collapsible stock*. The Aero Survival Pistol is also available in similar colors and calibers. - Barrel length: 16.25 - Barrel Twist: 9mm 1:10 .40 S&W 1:16 .45ACP 1:16 10mm 1:16 .357SIG 1:10 .22LR 1:16 (6 Land Barrels) - Overall length: US 33.0 - Overall length (Collapsed Stock): US 29.5 - Breakdown dimensions with barrel removed: 17.25 - Available calibers: 9mm .40S&W .45ACP 10mm .357SIG or .22LR - Magazine configuration: Glock pistol style (Remington for .22LR) - Left or right handed ejection - Weight: 5.5 lbs - Coating: Hard Anodized - Action: Semi-automatic direct blow back - Safety: Sliding safety and integrated child trigger lock - Optional three-day pack sold separately - Performance: 9mm Wolf ammo 1270 FPS - Includes: - One Glock Style magazine (One Remington style for .22LR) - Upper and lower rails