Seeing this reminded me of It's a Halo thing by Hans Van Harken
Don't know why , probably because of the cartoonish look which makes it look a bit goofy
love it
Seeing an animation with this style of master chief would be hilarious I think

And unlike the other guy who commented here I like the wonkyness of your rifle
You have your own drawing style and I would say don't get rid of it, It gives it a certain type of character

Hey, mate!

Solid cleanliness you've got here! Honestly, your lines are very crisp, and the coloring is all very well-done. About the only thing I'd say you really need to sit around and work on is your anatomy and technical skills. Your cartoonish style is absolutely perfect, though it could use a bit more guidance in the drawing department. For instance, the barrel of the rifle is a bit wonky, and could use some more depth and building, specifically. Same with the rest of the rifle. Otherwise, very solid! Keep up the good work, mate!

-Cullen V. Mathews-Bentley (Sottaceti)