The Armaspec Rook Micro Comp was created to address recoil and muzzle control without compromising on weight or size. Its design is slightly longer than a regular thread protector with slotted gas ports for effective recoil reduction. Its compactness and minimal weight ensure little to no visibility under concealed carry clothing, setting it apart from other options. With user-friendly wrench flats for easy installation, this comp offers great value, offering compatibility with various holsters and impressive recoil management in a compact, lightweight package. Features : Thread pitch: 1/2-28 Caliber: 9MM "Dimensions: Length 0.82" Width 0.74"" Material: Stainless Steel Finish: QPQ STATE RESTRICTION NOTICE This product may be regulated as an "assault weapon" feature or component (e.g., threaded barrel, muzzle device/compensator, or assembled upper) and may be restricted or prohibited in CA, CT, DC, HI, IL, MA, MD, NJ, NY, RI, VA, WA, and select municipalities. It is the buyer's responsibility to verify local, state, and federal laws before purchase. Orders that cannot ship to a restricted address will be canceled and refunded.