so the knex evolution seems to have reached its end
however i think i have some ideas, and if everybody understands there will be enough new challenges for these types of guns.
so the idea is:
the bullets will be charged with energy to make them fly, not a ram rod or mechanism or whatsoever, just a piece of ammo with a rubber band on it.
find a way to stack them up. this will make it harder to make a proper magazine but it'll be worth it.
for example a dark grey connector with a rubber band, piled to any size of rod, attach all the rubber band to the top of the magazine and make a mechanism not to put energy in the bullet, but to release them