Speed Loaders for Rifles?

[futue_te_ipsum 0]

i feel like a speed loader for mags would be nice, like portable too like this thing. and as for details, I feel like it should take the ammo into an inventory slot then speedloads. IDK if that would work like that but I'm sure there is a way to finagle it.

search up  @Eternal_Rezina on YT to check out the video reference 
                   NOT a Magazine

not a ad just saw this and wanted to inspire and show what it looks like

Edited February 22 by futue_te_ipsum
clarification