The KWA M33 AEG cylinders come in three different configurations, including types 1, 2, and 3. You can find the stock models with their types below:
Type 1: KM4A1, SR10, KM4 RIS, KM16 Battle Rifle, KM4 SR12, KR12, KR14.
Type 2: CQR Mod 1, KM4 Commando, KR9, SR7, CQR Mod 2, KM4 CQB, KR5.
Type 3: No current production model uses the KWA Type 3 cylinder, but it’s perfect as an upgrade for high speed builds where a higher rate of fire is desired. The centrally located port allows a faster piston return, speeding the cycling process.
Type 1, Type 2, Type 3