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Made of high-quality alloy material this is a durable cylinder head and nozzle.
The product consists of a gas accumulation cylinder head and an air seal nozzle suitable for the upgrade of the JM Gen 8 and Gen 9 M4A1 original gearbox. The cylinder head has a double-layered O-ring to enhance the airtightness of the cylinder and there is a cushioning noise-reducing silicone pad on the top of the cylinder head to buffer the impact on the cylinder head, effectively reducing noise.