Discontinued by Tippmann, see 25 round version from Tippmann Arms
This is the Tippmann Arms 20 round .22LR magazine for the Tippman M4-22, originally the only size for the Tippmann M4.
Featuring a 20 round magazine with full length window and thumb assist hidden inside a sliding 'magpul style' outer sleeve with waffle grips.
The sliding outer cover is held in place by spring loaded buttons at closed and open positions, overall a well designed magazine.
A 25 round version is in development, expected sometime in 2019.