A common complaint that people often have with Glocks is they shoot to the left for right handed shooters. What causes this? The obvious answers are you are flinching or adjust your rear sight. I know that every Glock that I ever bought or shot wasn't made so it would shoot to the left. It was something I was doing wrong. What is it? You and I don't have a Glock hand, plain and simple. It took me a while to figure this out. I'm a okay shooter. I've held my own in local competitions and even won a few here and there. Back in 92 someone decided to make me a firearms instructor for my department, because they thought I could shoot, teach and count bullet holes. So why in the hell is it when I shoot a Glock I have very nice groups to the left of my point of aim? My hands aren't small, they aren't huge either. I usually wear a large or extra large glove. My hand just isn't naturally made for a Glock.
I like Glocks for their simplicity, availability of parts and their reliability. I'm issued a Glock, I carry a Glock off duty, I've been around them for a long time. Hell, I'm even a Glock Armorer! I even believe I had one of the first G23s in Pennsylvania (back when only LE could purchase them) However, since day one I noticed they shot to the left for me. What causes them to shoot to the left for me and many other people? The grip. Take your Glock out that shoots to the left. Make sure it's unloaded. Check it again. Check it one more time just to make sure. Assume your firing grip and pull the trigger. Now with the trigger held to the rear pull on it a little more. Does your front sight go to the left? Keep on pulling back on the trigger to confirm what you are seeing. Yeah, mine moves to the left. So do a lot of other peoples too - don't worry there is a fix that helps MOST people and doesn't cost anything.
One way to correct this that works for some people is to rotate the pistol in your firing hand a little clockwise so the gun is about at 7 o'clock in the web of your hand. This may put a little more finger on the trigger too. Use the above method to check the front sight movement when the trigger is all the way to the rear. Adjust your trigger finger to see the difference it will make on your front sight movement. Ok, so you've messed around with that a little bit and noticed that you can grip the gun in this manner and pull on the trigger in some way that the front sight doesn't move to the left. The problem with changing the grip is that many holsters like the Safariland ALS / SLS series and the Blackhawk SERPAs force you into getting a good proper firing grip - with the gun firmly in the web of your hand. This slightly rotating the gun in your hand isn't going to work too well for drawing and getting a bullet on the target in a minimal amount of time.
Now what?
Get your good two handed grip (I use the standard thumbs forward grip) with the gun sitting in the web of your hand like it's an extension of your arm, the way it should be. Pull the trigger to the rear, pull on it a little more. Yeah, the front sight is still moving to the left. With the trigger held back, loosen the grip of your little finger on your strong hand. Pull the trigger back. Does that make a difference in the front sight movement? It does for me and many other people. Your options now are learn a new firing grip with little or no grip from your little finger or amputate your little fingers. Me? I opted for learning a new grip.
I hope this may help someone that has a problem with their Glock firing to the left. It did me!
NOTE: Try adjusting the position of your trigger finger too after you've played around with the grip. I've noticed that sometimes it helps to have a little more finger than normal on the trigger for Glocks.
As with anything, your mileage may vary regarding what I posted here. It may help you, it may not. However, I know it has helped many people in the past!