Shadow systems mr920 combat 9mm flutd/unthread brz bbl dl! FEATURES:Caliber: 9mm LugerMagazine Capacity: 15 roundsAction: Semi-AutoBarrel length: 4.01"Weight: 21.3ozIncludes two magazineCompatible with Glock Gen4 G19 holsters Other Features: Premium grip stippling, dlc diamond-like coated slide, s/s guide rod, fluted unthreaded bronze barrel, green tritium sights.No rmr slide cut front slide serrations, flat faced 4-4.5lb trigger.Compatible with glock gen4 g19 holsters, magazines, and accessories.