Like the MA5K, the team is looking for creative ways to reuse assets to bring new weapons into infinite. This is a completely new weapon in terms of use, it fires six fuel rods with new sounds, effects, and the classic reticle, but reuses the animations for the SPNKr.
H5 model definitely looks better, but iirc there weren’t all the required animations, which is why they are using bottomless clip to avoid reloading
I’m guessing this SPNKr reskin was going to be a weapon model and the team repurposed it. FRG (FRSr?) and MA5K both reuse existing animations, so I bet the team doesn’t have any animation support.