Decided to give this a shot and model a gun. Its a bit too square still and i accidentally left symmetry on and the ejector port ended up on both sides.
You're on the right path but you need to follow your references more closely. There are a lot of proportion errors that it doesn't resemble the Glock 18 silhouette. I highly suggest redoing these areas. Also, if you haven't decided already, if this is your high poly model it needs a lot more detail. It sounds tedious at…
Edit: This one is not a handgun tutorial, but the principles are mostly the same. I didn't like some glock tutorials I found because they were only using one reference. This video will teach you how to use multiple references for anytime you model. https://www.youtube.com/watch?v=2Tgy0lBdJK0&index=1&list=PL925958D31D8D30C7