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{{Firearm
| wpn_accfeed=[[USP .45 magazines]]
| wpn_accfeedstd=USP .45 12-round magazine
| wpn_accmuzzle=N/AStandard devices
| wpn_accmuzzlestd=None
| wpn_accoptics=N/A
{{Hebiquote
|quotetext=The H&K Mark 23 was designed to be an "offensive handgun", with the questionable intention of developing sidearms as primary weapons, for equally dubious purposes such as "sneaking missions". But no matter what you use it for, the Mark 23 is an extremely well-made, almost stupidly durable and reliable handgun. So durable and so reliable, that it doesn't matter how hot or cold your ammunition is - the Mark 23 will fire it and ask for more. Comes out of the box with a threaded barrel (suppressor highly recommended!), and a proprietary mount for the AN/PEQ-6 dual module. However, let's address the .45 ACP elephant in the room; the biggest drawback of this handgun is definitely its size. The Mark 23 is '''big'''. Really, '''really big''', kind of like this quote. There's a reason it is sometimes nicknamed the ".45 ACP [[Desert Eagle]]", and why its successor - the [[Heckler & Koch USP45|USP45]] - is much more reasonable in size. If that's not a problem for you, then trust a snake's opinion: Buy a Mark 23 as soon as possible, you won't regret it.|quoteauthor=Tempest
}}