Heckler & Koch HK45 Compact

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HK45 Compact (HK45C), which can use an 8-round and a 10-round magazine. The HK45C features the same improvements as the full-size HK45, but has a more conventional straight grip similar to Heckler & Koch's P2000. This design still allows the user to customize the grip size via interchangeable backstraps.

An HK45 Tactical (HK45T) and HK45 Compact Tactical (HK45CT) are also available; these variants include an extended threaded barrel for suppressors, and tritium front and rear sights.

Extended threaded barrels compatible with the HK45 and HK45C are also available for purchase from Heckler & Koch USA.

• Australia: HK45 was adopted by the Tactical Response Group of the Western Australia Police in 2008
• Singapore: Unknown variant was purchased for use by the special forces.
• United States: The HK45C / HK45CT was adopted by the United States Naval Special Warfare Command under the designation Mk 24 Mod 0.
  Also adopted by the Fort Lee Police Department in 2013 and the Maine State Police