Seneca Big Bore Tactical Conversion KitIncludes Seneca Tactical Stock Forend, Seneca Tactical Grip AdapterIncludes AR Advanced Modular 6 Position Stock, AR Buffer Tube, AR15 A2 Grip, AR Castle NutIncludes Steel Pan Head Slotted Screws, M5 x 0.8 mm Thread, Medium-Strength Steel Thin Square Nut (Zinc-Plated)Compatible with Seneca big bore air rifles such as the Seneca Dragon Claw II, Seneca Recluse II, Seneca Light Hunter IINot compatible with Seneca Wingshot II or Double Shot