The SilencerCo AC1361 Thread Protector is an essential accessory for any firearm enthusiast looking to maintain the integrity of their barrel threads. Crafted from durable black steel, this thread protector measures .578" x 28, making it compatible with most US-made .45 ACP firearms. When transporting your weapon or while awaiting ATF approval, this thread protector ensures that your threads remain crisp and free from dust and debris, effectively preventing any potential damage when a silencer is not in use. Simply twist the thread protector onto the end of your barrel to safeguard against cross-threading and keep your firearm in optimal condition. With its robust construction and practical design, the SilencerCo AC1361 Thread Protector is a reliable solution for protecting your rifle's muzzle threads, ensuring that your shooting experience remains seamless and hassle-free. Whether you're at the range or out in the field, this thread protector is a must-have for maintaining your firearm's performance and longevity.