Enhance your shooting setup with the Rugged Suppressor 3 Lug Adapter meticulously designed for 9mm HK specifications. Crafted with a sleek black finish this adapter features the innovative GoNo Go Gauge ensuring your suppressor is securely attached for a seamless shooting experience. With a 13.5x1 LH thread pattern it pairs perfectly with OSS's 3 Lug Mount offering compatibility and precision. Please note this adapter is specifically tailored for 9mm and not suitable for 45ACP firearms. Experience reliability and optimal performance with this essential firearm accessory.