Gun project

[pusangani]

hey I'm trying to build a sorta frankengun I took an older Talon paintball marker, its one of those shitty clear ones that use C02 capsules and that you have to cock for each shot,

ive basically cut off everything except the charging handle and the pistol grip which houses the C02 and the piston etc. and i took the magwell and about half of the receiver and flash hider off a clearsoft springer m4 and I cut off part of the barrel tube from the springer and taped it to the hole at the beginning of the m4 to make a nice tight seal, so to fire it i need to stick this tube into the hole at the end of the c02 piston

now the gun fires but its in 2 parts, and therefore not very useful but it is effective, any suggestions of how to connect both components keeping in mind that the paintball marker needs to be cocked after every shot, so it not only needs to connect but it needs to be able to slide back and forth

If this doesnt pan out im going to try and formulate my own airsoft grenades and turn it into a grenade launcher as the c02 part packs a nice punch, I will post pics later on