LH9 MKII (amongst other variants), featuring numerous updates including a redesigned hammer, wider slide serrations with added serrations to the front of the slide, redesigned grips, Cerakote finish, and optional Picatinny rail (as the MKII). The internal design and basic functions remain identical to the original and all the parts interchange between the original and the Lionheart variants. A later variant of the pistol was introduced in 2016 by Lionheart called the REGULUS, chambered in 9x19mm Parabellum. The REGULUS was made in the United States, not imported, as was the case with prior models of Lionheart pistols. The REGULUS built on the LH9 by adding Novak sight cuts, an accessory rail on the dust cover, and an overall change of the pistol's aesthetic. In 2019 the REGULUS was re-released by Lionheart's new owner when the company moved from Renton, Washington to Winder Georgia. Further refinements were made to the pistol including a redesign of the extractor, redesign of the recoil spring assembly, the addition of G10 grips, and an update to the pistol's finish using Cerekote Elite. Variants XK5: Experimental prototype. K5: Standard mass-produced variant. DP51: Commercial version of K5. DP51S: Semi-compact version with compact slide and full-sized frame. DP51C: Compact version of DP51. DH40: Commercial version of K5 chambered in S&W. DH45: Commercial version of K5 chambered in . LH9: Updated Version of the DP51 introduced by Lionheart Industries in 2011. LH9C: Compact version of the LH9. LH9 MKII: LH9 equipped with integral picatinny rail. REGULUS: Updated version of LH9 REGULUS Alpha: Full size pistol REGULUS Beta: Compact pistol Users : Purchased in 2011. : Purchased in 2011. : Standard sidearm. : Singapore Armed Forces Commando Formation (CDO FN) : Macedonia Armed Forces : 200 K5s transferred according to a 2019 SIPRI small arms report. References Bibliography External links S&T Daewoo Homepage US Distributor Lionhart Industries Homepage Modern Firearms, World Guns, Daewoo DP-51 / K5 pistol (Republic of Korea / South Korea) Gun Review: Lionheart LH9 By Nick Leghorn on March 4, 2013 Gun Review: Lionheart LH9 – Take 2 By Joe Grine on May 31, 2013 Proper lineage: a review of Lionheart’s LH9 Aaron Cowan April 30, 2014 9mm Parabellum semi-automatic pistols Post–Cold War weapons of South Korea Semi-automatic pistols of South Korea