The Commando Air-Thru features a carved-out groove that enhances the shooter's sightline and a high-pressure steel air line that seals directly to the 98 Custom's air system. Other features include an A2 foregrip, a stainless steel braided air line and an ASA fitting, and a quick-disconnect with an angled remote nipple. Installation is made simple with a solid attachment point. Buttstock length: 11 inches Height (at buttplate): 4 inches