ACETECH ACEHIVE 40mm Gas Grenade Cartridge (80rds bbs) Net-Weight-(g)_1028.0 The first thing you notice

The first thing you notice about this magazine is the dummy rounds inside

Magazine sensor

Also fit for Mounting Most Rifle Scopes on your Rifle/ Firearm (For 30mm/ 25mm Scope Tube)

Metal reinforced outer barrel

ACETECH ACEHIVE 40mm Gas Grenade Cartridge (80rds bbs) Net-Weight-(g)_1028.0 The first thing you noticeThis high capacity 40mm grenade shell can hold up to 80 BBs. To load, simply insert the BBs into the shell. Once filled, press the shell's locking button to secure the BBs in place and prevent them from spilling out. The shell is compatible with most standard 40mm grenade launchers. For optimal operation, please note that the gas fill valve is located at the bottom of the shell. It is recommended to fill the gas before loading the BBs for the best