Home / AR Upper Parts / AAT Black Hole Mid Length Gas Tube AAT Black Hole Mid Length Gas Tube PRODUCT DESCRIPTION Mid length gas tube. $21.99 AAT Black Hole Mid Length Gas Tube quantity Add to cart Category: AR Upper Parts Tag: Gas Tube Product ID: 7416 Specifications Related products AAT Black Hole Carbine Gas Tube $21.99 View Product AAT BLK Forward Assist $16.99 View Product Gravity ACH Ambidextrous $74.99 View Product AAT anodized dust cover $31.99 View Product