+3 BRT MarkBlue Gas Tube - Intermediate GT-1-INT $18.95 In stock Quantity: 1 Add to Bag Product Details The Black River Tactical MarkBlue Gas Tube is a premium quality gas tube used to complete an AR with a Noveske Intermediate length gas system. Note: Does NOT fit KAC Legacy MOD 0/1 or Wilson Combat 13.25" 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. Save this product for later Favorite