Difference Between 45 ACP and 45 GAP Pistols

45 ACP vs 45 GAP Pistols

The 45 ACP and the 45 Gap are the two most popular pistols being used today. Their popularity questions, which then is the better out of the two. Both pistols use different calibers but the same diameter of bullets (0.452 in). The ACP and the GAP show the type of the pistol used. The ACP stands for the Automatic Colt Pistol and the GAP stands for the Glock Automatic Pistol. The 45 GAP has a smaller grip than the 45 ACP however; the affordability and the availability for both differ as well.

45 ACP (.45 ACP)

The ACP cartridge was introduced in 1904 for use by the military from year 1911. The 45 ACP is less expensive to buy; however, its grip is big for the user. Despite the problems in handling the 45 ACP, this pistol is always appreciated for good performance. The performance of the 45 ACP is most concentrated on the fact that the size of the cartridge is large which results in a deeper penetration. This creates effectiveness in the use of the 45 ACP. The 45 ACP is considered to be the most original of all pistols, having been used for years and still is being retailed more than any other kind of pistol because of its popularity with the users and potential users whereby manufacturers feel the need to make more and more of the 45 ACP.

45 GAP (.45 GAP)

The cartridge used in the 45 GAP is short and the introduction of the 45 GAP was felt to be important because of a few shortcomings in the 45 ACP. The 45 GAP boasts to be a compact pistol compared to any other pistol. The 45 GAP is not the basic gun and is not suitable for novice pistol users, however, those interested in a pistol collection should consider this a collectibles item with its more expensive set of cartridges.

Differences between the 45 ACP and the 45 GAP

Though both pistols have their benefits, the 45 GAP has more pressure compared to the 45 ACP and therefore requires a harder casing to avoid explosion of the barrel. It maybe due to the popularity of the 45 ACP, the 45 GAP is very difficult to find and buy. The 45 GAP is more expensive than the 45 ACP, however, avid users do not really feel the need to be switching to the 45 GAP as they prefer the veteran of pistols, the 45 ACP to be as effective and readily available. The 45 ACP is considered to have a bigger grip than the 45 GAP, which makes it a less favorable choice with the women as tiny grips of the 45 GAP are more suitable to them.


Users of pistols and those experts in the field of pistols, think that though the 45 GAP is a more ‘attractive’ form of the 45 ACP, the same effectiveness of both pistols should not really make the user feel the need to switch to a 45 GAP from a 45 ACP.

  • Humpy

    It’s very unfortunate when people don’t know what the hell they’re talking about attempt to do so with this asinine explanation of the .45 ACP versus the .45 GAP.
    You should be talking about the cartridge itself not the many different types of firearms that use these cartridges: I.E. (ballistics)
    Even the explanation of the type of firearms that handle these cartridges is idiotic.

    • Paul Homsy

      Couldn’t agree with you more. It’s a very incomplete explanation. Ballistics are strictly what people want to hear about. They are what sells. Apples vs apples. The type of firearm and grip are very secondary. What do these higher pressures result in ? Similar ballistics ? Superior ? Inferior ? How about proper firearms tests with pressure tests…What happened to thorough research and communication ? Who carries the GAP. Where is it available and what is its street price are what should be provided. What do good pistol shots think of it ? What powders do best in this cartridge ? Who makes cases ? Norma, WW, RP, Hornady ?? Paper tests, photos of bull’s eye targets. Chronographed speeds with various bullet weights, loads and accompanying barrel pressure tests results. This is so amateurish that it could have been scribbled by a sixth grader.