The extended stabilizer enables one-handed firing for better shooting performance. It also comes with a Velcro strap fastener which provides a custom fit to any user. MCK Gen 2 is the most cost effect conversion kit in the world. Fastest assembly/disassembly conversion kit on the market. Improving accuracy dramatically up to 200 yards. MCK Gen 2 comes in two versions one is a NON-NFA product (with standard long stabilizer brace) and the other is a NFA product (with stock). - 8 Advantages over the first gen MCK: - 1. The Gen 2 MCK features a new extended stabilizer which allows the user to fire the Gen 2 MCK in the folded and locked position. The new stabilizer is compatible with Gen 1 MCKs as well. - 2. The Gen 2 rear door extends back an additional 15 degrees making it easier to insert and extract the handgun. - 3. The Gen 2 MCK accommodates suppressor height sights. - 4. The Gen 2 MCK features a new charging handle which makes more surface contact with the rear of the handgun slide. - 5. The Gen 2 MCK features an aluminum top picatinny rail for improved stability durability and accuracy. - 6. The Gen 2 MCK accepts CAA USA