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The South Korean military was using old Colt M1911A1 pistols in the 1980s, and as they became worn out a new pistol was needed. This would be something designed and built domestically, and chambered for 9x19. The small arms division of the massive Daewoo industrial conglomerate, called Daewoo Precision Industries, spent several years in the mid 80s designing what would be adopted in 1990 as the K5 pistol. It took elements from the Beretta 92 and 3rd-generation S&W automatics, and the "fast action" trigger mechanism from FN and combined them into a compact, reliable duty pistol.

The "fast action" trigger, also called "triple action" or "double action plus" is a DA/SA trigger in which the hammer can be manually pushed forward after being cocked. This gives the system a hybrid trigger pull, with the weight of single action but the length of double - theoretically ideal for carry.

Daewoo imported K5 pistols to the US until 1997 through several different importers under the designation DP-51 (and also the DP-51C compact and the DP-40 in .40 S&W). By the late 90s Daewoo was in financial trouble, and the small arms division was eventually spun off into a separate company, called S&T Motiv. They began importing the K5 again circa 2012, not designated the LH9, through US company Lionheart Industries. Lionheart moved form importing the guns to manufacturing them in Washington in 2016, renaming them the Regulus and adding better sights, slide serrations, frame texture, and other commercial options. Lionheart was subsequently sold to a new US owner and its manufacturing moved to Georgia, where it was again renamed as the Vulcan 9 and released in 2023.

The Vulcan-9 remains mechanically the same as the original K5, but offers a variety of modern options, including threaded extended barrels and optics cuts. It's still a relatively compact pistol, but one that is now pretty well loaded with features (albeit for a quite high price).

Thanks to Lionheart for loaning me the three iterations of their company's pistols for this video!

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Legacy of the K5: Daewoo DP51 Through Lionheart Vulcan-9 (Ad-free)

All the best firearms history channels streaming to all major devices: weaponsandwar.tv The South Korean military was using old Colt M1911A1 pistols in the 1980s, and as they became worn out a new pistol was needed. This would be something designed and built domestically, and chambered for 9x19. The small arms division of the massive Daewoo industrial conglomerate, called Daewoo Precision Industries, spent several years in the mid 80s designing what would be adopted in 1990 as the K5 pistol. It took elements from the Beretta 92 and 3rd-generation S&W automatics, and the "fast action" trigger mechanism from FN and combined them into a compact, reliable duty pistol. The "fast action" trigger, also called "triple action" or "double action plus" is a DA/SA trigger in which the hammer can be manually pushed forward after being cocked. This gives the system a hybrid trigger pull, with the weight of single action but the length of double - theoretically ideal for carry. Daewoo imported K5 pistols to the US until 1997 through several different importers under the designation DP-51 (and also the DP-51C compact and the DP-40 in .40 S&W). By the late 90s Daewoo was in financial trouble, and the small arms division was eventually spun off into a separate company, called S&T Motiv. They began importing the K5 again circa 2012, not designated the LH9, through US company Lionheart Industries. Lionheart moved form importing the guns to manufacturing them in Washington in 2016, renaming them the Regulus and adding better sights, slide serrations, frame texture, and other commercial options. Lionheart was subsequently sold to a new US owner and its manufacturing moved to Georgia, where it was again renamed as the Vulcan 9 and released in 2023. The Vulcan-9 remains mechanically the same as the original K5, but offers a variety of modern options, including threaded extended barrels and optics cuts. It's still a relatively compact pistol, but one that is now pretty well loaded with features (albeit for a quite high price). Thanks to Lionheart for loaning me the three iterations of their company's pistols for this video! https://utreon.com/c/forgottenweapons/ http://www.patreon.com/ForgottenWeapons http://www.floatplane.com/channel/ForgottenWeapons Cool Forgotten Weapons merch! http://shop.forgottenweapons.com

Comments

Mark Farris

Wish they'd import the LH9 again so I could buy one sub 1k.

ViejoLobo

Any feedback from the Korean military as to how well the pistols stood up under hard use, particularly the triple action?

BEAUSABRE23

C'mon, haven't ever heardof the

BEAUSABRE23

Haven't you ever heard of the 'Chicago Piano' ?

Thomas Batha

Do the Lionhart magazines work in your DP51? And, what is that neat finish on the Vulcan ?

Bruce Brodnax

I remember when you could pick up the DP51 for cheap in the '90s, because nobody really knew much about Korean guns and were suspicious of the "triple-action," and the prices of all the surplus cold war relics kept all firearms prices down [except AR15s; they were expensive vs. anything else back then, running ~ $2k-$3k in modern Biden-flated FRNs...] Needless to say, there's a LOT of guns I wish I'd bought back then when they were much cheaper than modern equivalent pricing...

Bruce Brodnax

Nope. "Chicago typewriter" yes, but piano? That's just too big to carry around...

Guido Schriewer

never heard any but rather high appreciation about those. must be a pretty good semi. I do... I think the goodold smiths en par or better than older sigs. top two of the wondernines in my book. if copycat anything might as well copy the best. that regulus looks hot.