The KRISS Vector Gen 3 SDP (Special Duty Pistol) in .45 ACP delivers the lightest and most agile member of the Vector family while chambering the proven .45 ACP cartridge for maximum stopping power. The compact, versatile footprint proves ideal for personal protection and home defense. The revolutionary Super V Recoil Mitigation System redirects recoil forces downward rather than backward, dramatically reducing muzzle rise and enabling rapid follow-up shots with the hard-hitting .45 ACP cartridge-control that would be impossible with conventional pistol designs. Combined with the world's lowest bore axis-positioned in line with the shooter's second knuckle-the Vector SDP provides mechanical advantage over recoil forces that conventional .45 ACP pistols cannot match. The fully redesigned Gen 3 upper and lower housings provide enhanced ergonomics, improved hand support, and expanded customization options. Compatible with full-size Glock .45 ACP magazines, the SDP delivers intuitive handling and seamless magazine interchangeability. At just 5.6 lbs and 15.35 inches overall length, this is the most compact Vector configuration available with big-bore defensive power. Ships with one 30-round magazine, cleaning kit, cable lock, user manual, and warranty card. Patented Super V Recoil Mitigation System The KRISS Vector's revolutionary Super V System is a delayed blowback operating system featuring a small bolt carrier group connected to a low-mass slider guided by channels in the frame that run perpendicular to the barrel. As the bolt cycles, the system redirects recoil energy downward rather than straight back into the shooter's hands. This downward-directed energy becomes a counterweight to the barrel's natural tendency to rise when fired. With .45 ACP's substantial recoil energy, this patented system transforms what would be a difficult-to-control pistol into an exceptionally flat-shooting defensive platform that enables rapid, accurate follow-up shots. World's Lowest Bore Axis The Vector features the lowest bore axis of any firearm in the world. The barrel is situated below the fire control group, positioned in line with the second knuckle of the dominant hand rather than high above it as with conventional pistol designs. This placement gives the operator mechanical advantage over recoil forces, as the recoil impulse pushes straight back through the hand rather than creating a lever arm that rotates the muzzle upward. With .45 ACP's powerful recoil impulse, this design advantage becomes even more pronounced, delivering flat shooting characteristics that keep sights on target. .45 ACP Defensive Power Chambered in .45 ACP, the Vector SDP delivers proven manstopping power with the time-tested cartridge trusted for over a century. The .45 ACP's 230-grain projectile at 850+ fps from the 5.5-inch barrel provides substantial energy transfer and penetration, making the Vector SDP exceptionally effective for defensive applications where immediate incapacitation is critical. Ultra-Compact Pistol Configuration The Vector SDP represents the most compact Vector configuration available. The 5.5-inch barrel and pistol format with no stock deliver just 15.35 inches overall length and 5.6 lbs weight, making the SDP exceptionally maneuverable in confined spaces. This compact footprint excels for home defense, vehicle deployment, and personal protection scenarios where larger firearms would be cumbersome. The pistol configuration also enables use with arm braces (sold separately) for enhanced stability without NFA requirements. Gen 3 Enhanced Ergonomics The fully redesigned Gen 3 upper and lower housings provide enhanced ergonomics with improved hand support positioning and refined grip angles. These updates improve shooting comfort and control during extended sessions while maintaining the Vector's distinctive appearance. The Gen 3 upper supports aftermarket pistol grips, providing customization options to match shooter preferences and hand size. Glock Magazine Compatibility The Vector SDP accepts full-size Glock .45 ACP magazines, ensuring reliable feeding with proven magazine designs. This compatibility provides flexibility with capacity options and eliminates proprietary magazine concerns. Ships with one 30-round magazine for extended defensive capabilities without reloads. 4140 Chrome Moly Barrel with Black Nitride Finish The 5.5-inch barrel is machined from 4140 chrome moly steel and treated with QPQ black nitride finish for exceptional corrosion resistance and wear characteristics. The barrel features .578x28 right-hand threading for suppressor or muzzle device attachment, enabling easy addition of sound suppressors or compensators designed for .45 ACP. Pivoting Single-Stage Trigger The pivoting single-stage trigger provides consistent pull characteristics and clean break for accurate shot placement. The trigger design accommodates the Vector's unique fire control group positioning below the barrel. Lightest Vector Configuration At just 5.6 lbs, the Vector SDP represents the lightest configuration in the Vector lineup. This reduced weight enhances maneuverability and reduces fatigue during extended carry or defensive scenarios while maintaining the full benefits of the Super V recoil mitigation system with .45 ACP's substantial power. Ideal for Home Defense and Personal Protection The compact dimensions, light weight, exceptional recoil control, and .45 ACP stopping power make the Vector SDP ideal for home defense applications. The ability to deliver rapid, accurate follow-up shots with a proven manstopping cartridge in confined spaces provides significant defensive advantages. The KRISS Vector SDP Gen 3 in .45 ACP redefines big-bore defensive pistols-revolutionary recoil control meets proven stopping power in an ultra-compact package. SPECIFICATIONS Manufacturer: KRISS USA Model: Vector SDP Gen 3 SKU: KV90-3PBL00 UPC: 811607039856 Caliber: .45 ACP Action: Semi-Automatic Operating System: Closed Bolt, Delayed Blowback (Super V Recoil Mitigation System) Barrel Length: 5.5 inches (139.7 mm) Barrel Material: 4140 Chrome Moly Barrel Finish: Black Nitride (QPQ) Barrel Threading: .578x28 RH Overall Length: 15.35 inches (390 mm) Weight: 5.6 lbs (2.5 kg) Stock: N/A (Pistol configuration - brace compatible) Trigger: Pivoting, Single Stage Magazine Compatibility: Full-size Glock .45 ACP magazines Magazine Capacity: 30 rounds Magazines Included: 1 Generation: Gen 3 Upper: Gen 3 (fully redesigned, aftermarket pistol grip compatible) Lower Housing: Gen 3 (enhanced ergonomics, improved hand support) Bore Axis: Lowest in the world (below fire control group) Color: Black Firearm Type: Semi-Auto Pistol Included Items: (1) KRISS Vector SDP Firearm (1) 30-round Magazine (1) Cleaning Kit (1) Cable Lock (1) User Manual (1) Warranty Card