Our take: This 20rd spare gas magazine fits the KWA/H&K Licensed MP7 gas blowback SMG. Extremely high quality construction and advanced gas seals to prevent leakage.
Magazine Capacity: 20 rounds
NOTE: DO NOT USE PROPANE, RED GAS, or HFC 134a Gas with this KWA product. Using propane with this KWA Gas Blowback will void the manufacturer's warranty, and can cause irreparable damage to the rifle.