H&K Mark 23

A massive .45 ACP chambered handgun, it was entered in the Offensive Handgun Weapon System competition against Colt. H&K won the contract with the Mark 23 being adopted by USSOCOM. Heckler & Koch have very little experience with manufacturing suppressors; they supposedly contracted Knights Armament to produce an appropriate model for their pistol during the competition when H&K’s own suppressor design couldn’t cut it.

(via bourbon-bear)