Product Description The Otter Creek Arms OCL304 OPS AE OC Thread Protector is a precision-machined, knurled thread protector crafted from durable 17-4 stainless steel and finished with a raw heat treat. Designed for compatibility with OPS 12, AEM, and OCM pattern muzzle devices, this thread protector also fits the OTB, OTB-MB/FH, PTB, and MWA 1-piece adapters. The distinctive diamond knurling on the exterior provides a secure, positive grip for easy installation and removal, while the high-quality stainless steel construction ensures long-lasting corrosion resistance and strength under demanding conditions. Product Highlights Constructed from 17-4 stainless steel for superior strength and corrosion resistance Raw heat treat finish gives the protector a distinctive, durable appearance Diamond knurling on the exterior allows for a firm, slip-free grip during installation Compatible with OPS 12, AEM, and OCM pattern muzzle devices as well as OTB, OTB-MB/FH, PTB, and MWA 1-piece adapters Precision-machined internal threading ensures a secure, reliable fit on compatible muzzle devices Specs Brand: Otter Creek Arms LLC MPN: OCL304 UPC: 664533659021 Material: 17-4 Stainless Steel Finish: Raw Heat Treat