Crossbow Bullpup

i was trying to make https://www.instructables.com/member/Seleziona/ SSCB-11 but i ran out of parts 
so i made it a crossbow instead i add a stock and ammo storage in the stock and it only holds 4 rounds and it has
https://www.instructables.com/member/brammeke11/ Automatic Bipod with a few mods to make it fit my needs
PROS
range about 30 feet Accuracy about 20 feet with 2 #64 rubber bands
bullpup design
comfy stock
looks goods
takes as many rubber bands as you can pullback
bi-pod
CONS
no working mag it's just there for looks and keeps the ammo level
single shot 
stock only holds four rounds