Spare KWA KP45 Compact / USP Compact Airsoft Gas blowback magazine (NS2 System)

For: KWA KP45 / USP Compact. (Not for KP45 / USP Full size)
Gas System: KWA NS2 System
Manufacturer: KWA
Capacity: 22+1
BB:6mm. (The KWA MP9, UMG and USP series uses regular 6mm Airsoft inner barrel that works great with all high grade bbs. However, their magazine chambers are designed to feed best with 5.88mm KSC bbs that are smaller in size. Most high grade 6mm Airsoft bb may still work but lubrication and perfect stacking may be required for optimized smooth feeding.)