Thanks to Reytuerto pointing out a detail about the M14E2, I have fix that by adding a little line to show that the grip has indeed been glued to the stock. I also have added some shading to it but I will admit that shading is not something I am terribly good at.
Also have drawn the M14 with the Starlight night vision scope. This thing is massive and I have struggled to make sure it is proportional to the drawing, quite difficult due to the lack of dimensions for this particular model. If anyone have any please do let me know!
Another model of the M14 is the M21, which is just an M14 that have been rigged to only be set to semi-automatic and given a scope, making it a dedicated marksman rifle. Many thanks to Darth Panda for the basis of the scope.
Finally, the last drawing I have is the modern Mk 14. The modern take on the classic M14 by giving it a new body including rails for accessories to be attached to. Thanks to Darth Panda once more for the scope and bipod.
As always, thank you to Colosseum for the M14 itself and if there is anything wrong with the drawings please do correct me! Once again, thanks Reytuerto for pointing out the M14E2!