You should look for internal pictures on the internet and try to match the insides of the gun with the picture.
make sure all the springs are intact
look for pictures of the insides on google or nerfhaven.com and match your gun with the picture.
No, unless you mod it.
The NERF Maverick can indeed shoot whistler darts.
No, the Nerf recon is more powerful.
There is'nt any more
yes
20cm
No Nerf did not, but Nerf did make a clear maverick shown here: \http://3.bp.blogspot.com/_Rwilj6uxGkQ/SX0sHA53AxI/AAAAAAAAAFY/1qRyAafCido/s400/DSC01951.JPG
It's a revolver.
Yes
The Barricade