.45 GAP

Pistol cartridge designed by Ernest Durham .45 GAP 45GAP Glock Automatic Pistol 002.jpg 300px A .45 GAP cartridge. AustriaUnited States Pistol 2003–present Ernest Durham November 2002 CCI/Speer 2003–present No Rebated, straight walled 11.48 19.18 27.18 Small pistol 138 CIP 160 SAAMI No 185 Gold Dot JHP 350 734 200 Gold Dot JHP 320 664 230 Gold Dot JHP 285 605 230 FMJ-FP 286 610 4.49 in DoubleTap AmmoDoubleTap Ammo .45 GAP page http://www.doubletapammo.com/php/catalog/index.php?cPath=21_41 https://web.archive.org/web/20090420034755/http://www.doubletapammo.com/php/catalog/index.php?cPath=21_41 2009-04-20 dead 2009-06-18 The .45 GAP (Glock Auto Pistol) or .45 Glock (11.43×19mmRB) is a pistol cartridge designed by Ernest Durham, an engineer with CCI/Speer, at the request of firearms manufacturer Glock to provide a cartridge that would equal the power of the .45 ACP, have a stronger case head to reduce the possibility of case neck blowouts, and be shorter to fit in a more compact handgun. The .45 GAP is the first commercially introduced cartridge that has been identified with Glock. Development The .45 GAP has the same diameter as the .45 ACP pistol cartridge but is slightly shorter, and uses a small-pistol primer instead of the large-pistol primer most commonly used in .45 ACP ammunition. Originally, the maximum bullet weight of the .45 GAP was 200 gr. In order to provide terminal ballistics that matched the standard 230 gr on .45 ACP loads, the .45 GAP was designed to operate at a higher standard pressure—roughly equivalent to the higher pressures found in .45 ACP "+P" rounds. Since the .45 GAP has a much smaller cartridge volume than the .45 ACP, the desired pressure and resulting velocity needed to be achieved through powder selection alone. Later development concluded that the .45 GAP can also fire 230 gr on projectiles, as does the .45 ACP; though this pushes the .45 GAP cartridge to its limits.January 2021 Glock .45 GAP pistols The full-size Glock 37 pistol was introduced by Glock to use the .45 GAP cartridge and was followed by the compact Glock 38 and the subcompact Glock 39. Glock's .45 GAP–sized pistols use the same frame as their 9×19mm/.40 S&W/.357 SIG line of pistols. The slide is slightly wider to accommodate the larger diameter .45 round and is flush with the frame. Magazines for the .45 GAP are of the same dimensions as those of the 9×19mm/.40 S&W/.357 SIG line of pistols. Other .45 GAP firearms Initially, due to its acceptance by law enforcement and the popularity of subcompact handguns for concealed carry, a small number of manufacturers decided to produce pistols that were chambered in .45 GAP, but they no longer produce any pistols in that caliber. Only Glock continues to manufacture pistols in the .45 GAP cartridge. Springfield Armory, Inc. did make the XD series in .45 GAP, and indeed it was the first commercially available pistol for it, but discontinued that chambering soon thereafter. Law enforcement applications Modern law enforcement as a whole has moved away from .45 caliber weapons in favor of firearms chambered in .40 S&W and 9×19mm. Despite this change, the .45 GAP initially had a following amongst many law enforcement departments. Three state law enforcement agencies adopted the .45 GAP as a replacement for their issue 9×19mm Parabellum (New York) or .40 S&W service handguns (South Carolina and Florida). The New York State Police (New York Police have recently completed the transition to .45 ACP for their duty round), South Carolina Highway Patrol, and Florida Highway Patrolhttp://www.bluesheepdog.com/2010/01/25/unique-gen-4-glock-in-45-gap-for-florida-highway-patrol/ Gen 4 Glock Bluesheepdog.com 12 November 2021 had all adopted the Glock 37 and .45 GAP. As of 2025, the New York State Police, South Carolina Highway Patrol, and Florida Highway Patrol no longer issue firearms chambered in .45 GAP.Glock discontinues "those" calibers 10 April 2025 https://smith-wessonforum.com/firearms-knives-other-brands-general-gun-topics/740021-glock-discontinues-those-calibers.html The Pennsylvania State Police also carried the Glock 37 from 2007, but, due to ammunition supply problems, replaced them in 2013 with the fourth generation Glock 21 in .45 ACP. After recall issues with the new fourth generation Glocks, the Pennsylvania State Police switched to the SIG Sauer P227 in .45 ACP.http://weaponsman.com/?p=16496 Pistol OCD: The Pennsylvania State Police WeaponsMan November 27, 2021 Hognose https://web.archive.org/web/20171013193706/http://weaponsman.com/?p=16496 October 13, 2017 See also .44 Magnum .45 Super 10mm Auto 11 mm caliber List of rebated rim cartridges List of handgun cartridges List of rifle cartridges Table of handgun and rifle cartridges References External links .45 GAP Category:Rebated rim cartridges Category:Pistol and rifle cartridges Category:Paramilitary cartridges