.45 GAP

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.45 G.A.P.
45GAP Glock Automatic Pistol 002.jpg
A .45 GAP cartridge.
TypePistol
Place of origin Austria
 United States
Service history
In service2003–present
Production history
DesignerErnest Durham
DesignedNovember 2002
ManufacturerCCI/Speer
Produced2003–present
Specifications
Case typeRimless, straight
Bullet diameter.451 in (11.5 mm)
Case length.755 in (19.2 mm)
Overall length1.070 in (27.2 mm)
Ballistic performance
Bullet weight/typeVelocityEnergy
185 gr (12 g) Gold Dot JHP1,150 ft/s (350 m/s)543 ft·lbf (736 J)
200 gr (13 g) Gold Dot JHP1,050 ft/s (320 m/s)490 ft·lbf (660 J)
230 gr (15 g) Gold Dot JHP935 ft/s (285 m/s)447 ft·lbf (606 J)
230 gr (15 g) FMJ-FP940 ft/s (290 m/s)451 ft·lbf (611 J)
Test barrel length: 4.49 in
Source(s): DoubleTap Ammo[1]
 
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.45 G.A.P.
45GAP Glock Automatic Pistol 002.jpg
A .45 GAP cartridge.
TypePistol
Place of origin Austria
 United States
Service history
In service2003–present
Production history
DesignerErnest Durham
DesignedNovember 2002
ManufacturerCCI/Speer
Produced2003–present
Specifications
Case typeRimless, straight
Bullet diameter.451 in (11.5 mm)
Case length.755 in (19.2 mm)
Overall length1.070 in (27.2 mm)
Ballistic performance
Bullet weight/typeVelocityEnergy
185 gr (12 g) Gold Dot JHP1,150 ft/s (350 m/s)543 ft·lbf (736 J)
200 gr (13 g) Gold Dot JHP1,050 ft/s (320 m/s)490 ft·lbf (660 J)
230 gr (15 g) Gold Dot JHP935 ft/s (285 m/s)447 ft·lbf (606 J)
230 gr (15 g) FMJ-FP940 ft/s (290 m/s)451 ft·lbf (611 J)
Test barrel length: 4.49 in
Source(s): DoubleTap Ammo[1]

The .45 G.A.P. (often called the .45 "GAP") pistol cartridge was 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 shorter to fit in a more compact handgun . G.A.P. is an acronym for "Glock Automatic Pistol", and the .45 G.A.P. is the first commercially introduced cartridge identified with Glock.

Development[edit]

The .45 GAP has the same diameter as the .45 ACP pistol cartridge, 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 grains (13 g). In order to provide terminal ballistics that matched the standard 230-grain (15 g) .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. The .45 GAP has a much smaller cartridge volume than the .45 ACP, and the desired pressure and resulting velocity therefore had be achieved through powder selection alone. Later development concluded that the .45 GAP could also fire 230-grain (15 g) ammunition as did the .45 ACP.

Glock .45 GAP pistols[edit]

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. The manufacturer lists the width of all three pistols as 1.18" wide, compared with 1.27" for the .45 ACP Glock 21 and Glock 30, indicating that Glock could shorten the grip width and front to back grip size. Glock's .45 GAP sized pistols use the same frame as their 9mm/.40cal/.357SIG line of pistols. The slide is slightly wider to accommodate the larger diameter .45 cal round and is flush with the frame. Magazines for the .45 GAP are of the same dimensions as those that the 9mm/.40/.357sig line of pistols use.

Law enforcement application[edit]

Four state law enforcement agencies have adopted the .45 G.A.P. as a replacement to their current issue 9×19mm Parabellum (New York) or .40 S&W service handguns (Georgia, South Carolina, and Florida). The New York State Police, Pennsylvania State Police, Georgia State Patrol, South Carolina Highway Patrol, and Florida Highway Patrol[2] have all adopted the Glock 37 and .45 G.A.P.

Initially, due to its acceptance by law enforcement and the popularity of subcompact handguns for concealed carry, a small number of manufacturers produced pistols that were chambered in .45 G.A.P., including some Para-Ordnance M1911s and the Springfield Armory XD. Para has since dropped the G.A.P. Springfield Armory's XD pistol is listed in several different 45 G.A.P. varieties on their web site, but they no longer produce any pistols in that caliber. Only Glock continues to manufacture pistols in the 45 G.A.P. cartridge.

See also[edit]

References[edit]

External links[edit]