The PTR 91 A3R features a collapsible/retractable stock in the style of the HK91 A3 variant, allowing length-of-pull adjustment and a more compact stored length. The 18-inch barrel and roller-delayed mechanism are unchanged from other PTR 91 variants. The A3R designation indicates the retractable stock. Preferred by users who need more flexibility in length-of-pull or who store the rifle in a vehicle. Type: Rifle Action: Semi-Automatic Caliber: .308 Win Capacity: 20 Year introduced: 2006, USA Weight: 192 oz Overall length: 40.5" Status: Active Intended use: sporting, patrol