TTI Piston Head for AAP-01 / TM G18c The TTI aluminum piston head is a purpose-built upgrade for Action Army AAP-01 and Tokyo Marui G18c gas blowback pistols. Designed for durability and reliable performance, it’s a practical enhancement for players seeking steadier cycling and consistent seals. Material: Aluminum construction for strength, lightweight feel, and lasting use Compatibility: Specifically fits Action Army AAP-01 and TM G18c gas pistols only Sealing: Rubber D-ring helps maintain a tight, consistent air seal Hardware: Includes the screw for straightforward installation Installation: Simple swap with the supplied screw—no complicated modifications required The piston head’s precision machining and robust materials translate to more reliable performance under field or range conditions. Expect improved air seal integrity, reduced gas leakage, and more predictable shot consistency, especially when running higher-pressure setups or rapid-fire scenarios. This upgrade is ideal for players who want a durable, easy-to-install replacement that preserves the intended feel of their AAP-01 or TM G18c without altering other system dynamics.