Caseless ammo? Been done already.
Daisy VL.. 1968. Yes Daisy the BB gun maker made a 22 caliber caseless gun.. They even got into trouble with the ATF over it.
Caseless w/ Electronic Ignition? Been there too!
Commercial Sporting Rifle: Voere VEC-91 1993 imported into the US.
Prototype Military Arm... H&K G11
Daisy VL.. 1968. Yes Daisy the BB gun maker made a 22 caliber caseless gun.. They even got into trouble with the ATF over it.
Caseless w/ Electronic Ignition? Been there too!
Commercial Sporting Rifle: Voere VEC-91 1993 imported into the US.
Prototype Military Arm... H&K G11