Looks really good so far. A couple things i noticed that i would change,
1. The part where you put your hand in for the grip needs to move towards the back of the gun a couple inches.
2. The area behind the front grip before the trigger should be more level with the front grip.
Heres a picture trying to show what i mean.
Youre doing a good job. If you have any problems or anything feel free to PM me. Im in the process of making mine right now. There not enough progress to post any pics but its coming along nicely. How are you going to go about making it? Planning on having electronics or anything? Keep up the good work!