45 ACP vs 45 GAP Pistols – Difference and Comparison

What is 45 ACP?

The full form of ACP is Automatic Colt Pistol. It is a common type of weapon used worldwide by law enforcement officers. This type of pistol has a bigger grip when compared to 45 GAP. 45 ACP is much cheaper since there are some downsides when compared to 45 GAP. 45 ACP is rimless and uses a 230-grain bullet.

45 ACP cartridges are very effective since it has the power to penetrate the tissues deeply and damage the central nervous system; it will incapacitate the target because the bullet will transfer all the kinetic energy to the target. But there are some downsides for 45 ACP. The cartridge is large, and the weight of it is heavy as well.

Overall, it is a powerful, effective weapon and won’t dissatisfy the user. An interesting fact is that this pistol had been used during world wars by the united states military as a sidearm. It is popular among sports shooters and the army.

What is 45 GAP?

45 GAP is Glock Automatic Pistol. It is a famous type of pistol, which is small and has a thin grip. This is used by secret agents and underground cops. But, 45 GAP is a little more expensive and contains expensive cartridges. It even operates at a higher pressure and needs a harder casing to avoid the explosion of its barrel due to high pressure.

According to pistol experts and users, 45 GAP is an attractive pistol with advanced features. The 45 GAP bullets are more accelerated and have much energy since the inside of the barrel possess a high amount of pressure. This type of pistol has smaller ammunition as well.

45 GAP is designed by Ernest Durham in 2003. It has a rimless, straight case and operates at 23,000 psi. Even though it is most popular, it is difficult to find this pistol since many manufacturers don’t create this pistol. The maximum weight of a bullet is 200 grains.

Difference Between 45 ACP and 45 GAP Pistols

  1. 45 ACP was designed in 1904 by John Moses Browning. Whereas 45 GAP is designed by Ernest Durham in 2003.
  2. 45 ACP is larger. Whereas, 45 GAP is smaller in size and easy to carry
  3. 45 ACP operates at 23000 psi, and 45 GAP operates at 21,000 psi
  4. The full form of 45 ACP is Automatic Colt Pistol and 45 GAP is Glock Automatic Pistol
  5. 45 ACP is cheaper and 45 GAP is much more expensive

Comparison Between 45 ACP and 45 GAP Pistols

Parameters of comparison45 ACP45 GAP
Full formACP stands for Automatic Colt PistolGAP stands for Glock Automatic Pistol
Origin45 ACP was invented in 1905 by John Moses Browning45 GAP is designed by Ernest Durham in 2003
Place of originIt is originated in the United States45 GAP is originated in Austria, United States
PressureIt operates at 21,000 psiThis type of pistol operates at 23,000 psi
Grip45 ACP has a bigger grip45 GAP has a tiny grip


  1. https://www.ncjrs.gov/App/abstractdb/AbstractDBDetails.aspx?id=204547
  2. https://www.ojp.gov/library/abstracts/springfield-armory-xd-45acp