The KAK Shockwave features the patent-pending blade pistol stabilizer. Made from high-strength glass-reinforced polymer, the Blade is manufactured to exacting tolerances and fits all pistols equipped with a Mil-Spec AR-15 buffer tube. No special receiver extension needed. No half-hour installation process.This veteran-designed and improves your marksmanship by providing additional support of your pistol while you still hold and operate it with one hand. The Blade incorporates a vertical "fin" which you stabilize against the inside of your forearm when in the firing position. Or, you can stabilize the Blade against your cheek for a perfect, steady sight picture. FeaturesFits all pistol equipped with a Mil-Spec AR-15 buffer tubeAR Pattern, Glock, CZ Scorpion Evo 3, HK9X pattern, etc.Quick and easy to installProvides additional support during firing Note: Buffer Tube not included (must be purchased separately)