SIG Sauer Proforce Spare Magazine For P320 M17 MHS GBB Pistol - CO2 - Tan CO2 Pistols A quick disconnect and slide

A quick disconnect and slide check on/off allows you to de-gas your marker and remove the line without depressurizing the system

but appears to be done poorly or it is simply coming off

and Proto loader

A revolutionary new spool valve design using Breech Sensing Technology and a unique pneumatically latching spool to accurately control the exact amount of air released for each shot completely independently of the solenoid and the dwell time

When trying to shoot super-fragile

SIG Sauer Proforce Spare Magazine For P320 M17 MHS GBB Pistol - CO2 - Tan CO2 Pistols A quick disconnect and slideFeatures: Metal alloy construction Compatible with 12g CO2 cartridges 21 round capacity Specifications: Compatibility: SIG Sauer Proforce P320 M17 MHS GBB Pistol Magazine: 21+1 rounds Gas Type: 12g CO2 cartridge