From front to back.
The stock looks a tad blocky and I am hard pressed to see how the gun could fire with little space for the trigger bar to go.
The mag well doesnt seem to have much space to lock and really seat that mag aside form the front and back. I have seen small magwells on PPSH and Thomson firearms. I suggest some sort of rail for the mag to really keep it in there.
I dont see how the mag could be released and the button in the back looks like a bolt catch/release.
The bolt channel looks well made so props to that.
The pistol grip is going to need A LOT of minimizing. It looks like something you would see on nerf guns where the grip is really big and uncomfortable. Also push it a bit more towards the grip unless its a double action trigger.
No sure what the space between the rails is.
Other then that looks like a good start.
Never thought of that...
Well, the little button is for a mag release whether you like it or not
Agreed with the pistol grip now that you mention it...
Space between the rails is for an adjustable modulator for the gas-block.