Hey, there - you guys seem to be doing great with your gun models. Many of you are learning as you go so it could be wise to take a step back from time to time and assess the basic silhouette of your weapon - is it as good as it could be? The instant read of your model is the most important thing - the first thing observers see is the shape. So don't get too deep into the details until the basic contours are working.
Here's a great article from 3DArtist magazine all about topology -
Don't be afraid to ask for help. Peer tutors are available now. Share your knowledge if you have extra to share :o) and remember, helpful people deserve your thanks and maybe a small gesture like a cookie or a coffee. But usually what goes around comes around -- for every helpful gesture another usually comes back to you in ways you might not expect.
Looking forward to seeing your models next week!