Modular pistol comes in full, compact (shown) and sub-compact size. Offered in 9mm, .357 SIG, .380 ACP (sub-compact only), .40 S&W and .45 ACP. Double-stack magazine capacity 17 rounds (9mm & .380), 14 rounds (.357 & .40), 10 rounds (.45). Design allows shooter to change calibers, grip size and model size. Double-action-only operation. Features include an accessory rail, Nitron slide finish, contrast or SIGLITE night sights. A compact .22 rimfire version is available, with similar features. Note: Add $80 for night sights. Deduct $50 for .22 rimfire version.