The lightest form factor of the Vector family, the KRISS Vector Gen 3 SDP is the ideal choice for personal protection and home defense. The upper and lower housings have been completely redesigned for customizability and increased hand support. The SDP is fed with full size Glock(R) magazines, ensuring seamless interchangeability for users familiar with Glock-style mag. Features Interchangeable AR15 / M16 Pistol Grip Interchange Ambidextrous Magazine Release Rear Picatinny Rail Stock Mount Skeletonized Trigger with 0.7mm Pre-Travel Ambidextrous Short Throw Safety Lever Gen 3 Low Profile Upper Housing Gen 3 Bolt Release and Mounting Block Full Length MIL-STD 1913 Picatinny Top Rail Short Charging Handle / Brass Check Function 4-Pin Tool-Less Disassembly Caliber 10MM Model Vector SDP Action Semi-Automatic Operating System Closed Bolt, Delayed Blowback Barrel Length 5.5 in / 139.7 mm Overall Length Collapsed 15.35 in / 390 mm Magazine(s) included (1) 33 Rounds Color Black Weight 5.6lbs / 2.5 kg Barrel Material 4140 Chrome Moly Barrel Finish Black Nitride (QPQ) Barrel Threading 9/16x24 RH Trigger Type Pivoting, Single Stage