What mods do my T.C.R. 51 need?

This is my best gun that I have made so far. I feel it needs modded though. What mods, other than more power; do this gun need?

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Maybe trigger guard, try a spring loaded mag, pin guide, iron sights(These are small kinda unnecessary mods except for a pin guide) other than that excellent gun!
iceng6 years ago
Does it really launch a projectile ?
what do you think

lol look at my guns

Looking more carefully, the bands answers my question.
That's something my Lego blocks couldn't do.

very true there to wimpy