READ CAREFULLY! They all leak somewhere at the bottom... it's the fill valve or the o-rings that require changing. These are relatively old mags, so you may want to ensure all seals are nice and lubed prior to using them.

Product Description:

Bell New M92 Green Gas Magazine
Features:

Full metal construction

KSC compatible

Should technically be compatible with KWA M92

OEM mag for DB M92 (DB 726), NOT Taurus M9

Good air seal

High output valve