Sip I hate to say it but I feel like the laser housing (the part that bends over the top of the gun whatever its called) is too tall? I think it may be because the main body of the gun (slide) is too tall (I'd say taking like a thumbs width off of it would make it perfect). That's just how I feel though. I just mention it so you don't build the whole thing and then decide its not like what you wanted (made that mistake before :angry )
keep it up though, I feel like this is gunna be cool when your done