Description
The Black River Tactical MarkBlue Gas Tube is a premium quality gas tube used to complete an AR with a mid length gas system.
The distinctive “MarkBlue” dot allows easy identification of a genuine BRT gas tube and guaranteed performance.
It is compatible with BRT MicroPin Gas Blocks, front site bases and low profile gas blocks.
Includes a stainless steel gas tube and a stainless steel spiral coil spring pin.
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