M-4 Carbine Complete Uppers

There are a great advantages to be had from conversion to gas piston operation. The weapon needs a lot less cleaning and lubrication, component life is greatly increased and the firing cycle is much less violent, enabling faster follow-up shots. The Adams Arms piston conversion kit has won numerous accolades. There are no less than three settings to enable conventional use, suppressed operation and manual reloading. The system is also included on the Adams piston upper. The Adams Arms complete piston upper is available in 16"

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