This is a top loading, blind internal magazine, bottom metal for the Howa Mini rifle.
It's simple lightweight design allows you to have 3 rounds in the magazine of 6.5 grendel or 7.62x39 and 4 rounds in 223 remington or 300 blk. No accidental mag drops or cartridge dumps. Complete assembly weighs 3oz.
The 223 caliber option works with 222 Remington, 204 Ruger, and additionally has been tested to work with short cartridges such as the 221 Fireball and 17 Fireball.