Heckler & Koch Mark 23
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The Heckler & Koch MK 23, MK 23 MOD 0, Mark 23, or USSOCOM MARK 23 is a semi-automatic large-frame pistol chambered in .45 ACP, designed specifically to be an offensive pistol. The USSOCOM version of the MK23 came paired with a laser aiming module... Wikipedia
Action: Short recoil, DA/SA, Modified Browning Action, Linkless. SA pull 4.85 lbs. (2.20 kg) and DA pull 12.13 lbs. (5.50 kg)
Barrel length: 149.10 mm (5.87 in)
Cartridge: .45 ACP Can also fire.45 Super using factory parts and no modifications
Designed: 1990s
Effective firing range: 50 m
In service: 1996–present
Manufacturer: Heckler & Koch