The RZ17 is a heavy-duty pump featuring a spring loaded forward assist action for positive lockup and rugged synthetic furniture. This version has a 28 chrome lined vent rib field barrel and 5 choke tubes. This gun uses Mobil thread pattern choke tubes. Specialty after market chokes available from: Trulock Carlson's Patternmaster and Briley. - Specifications - Gun Weight: 6 lbs. 14 oz. - Length of Pull: 14.25 - Overall Length: 48.5