When it comes to handguns for self-defense, the Glock 19 and Sig P320 are two of the most popular options available. Both are reliable, modular and battle-tested. But there are key differences between the two that need to be understood in order to decide which is best for you.Sig P320 has a smoother trigger pull which some people prefer. It is also striker-fired, whereas the Glock 19 is a double-action pistol. The barrel length of the Glock 19 is 4 inches and the overall length is 7.28 inches, while the Sig P320 has a barrel length of 4.7 inches and an overall length of 8 inches. The Glock 19 is slightly more compact.The Sig P320 has replaceable grip frames, so it can be customized to fit any hand size. The Glock 19 has a slightly lower bore axis which means the recoil is more manageable and the muzzle rise can be minimized. In addition, the Glock 19 is known for having a durable polymer frame and is usually associated with lower maintenance costs.When it comes down to it, it’s hard to pick definitively which one is better as it largely comes down to preference. If you have small hands, the Sig P320 is a great option due to its replaceable grip frames. But Glock 19 has a more compact size and more manageable recoil, making it an ideal choice for those looking for a versatile pistol.