Deep Fire bore-up nozzle, M4A1 / M16A2

Deep Fire's improved nozzle for M4A1 / M16A2 weapons. This model is a so-called bore-up model, which allows for a larger airflow from the cylinder to the hopper unit. The feature is implemented by expanding the inner diameter of the nozzle, so this nozzle is only suitable for use with corresponding Bore-up cylinder heads. When installed in a regular cylinder head, this nozzle will be loose.