Roni and Micro Roni are series of carbine conversion kits manufactured by "CAA Industries":https://caaindustries.com/product-category/micro-roni-and-roni/, compatible for many [[handgun]]s such as [[Glock]]s.
The kit features Picatinny rail on top, [[folding stock|side-folding stock]], and sometimes a [[foregrip]] that can store a spare [[magazine (weapon)|]] in it.
micro roni