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 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 9X19 - 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) 40 Rounds - Color Black - Weight 5.6lbs / 2.5 kg - Barrel Material 4140 Chrome Moly - Barrel Finish Black Nitride (QPQ) - Barrel Threading 1/2 x 28 RH - Trigger Type Pivoting Single Stage