Product Description The KAK Industry Plan B Big Hole Brake is a precision-engineered muzzle device designed for shooters who require consistent, repeatable lockup with their suppressor system. Featuring a tapered profile followed by threads, this muzzle brake delivers a reliable and proper seal between the device and the suppressor adapter every time it is installed. Fully machined in-house at KAK Industry, the Plan B Big Hole Brake is constructed from 17-4 Stainless Steel with a durable Nitride finish in black, providing excellent corrosion resistance and long-term durability. Compatible with Plan B suppressor hubs, this device is designed for .223-9MM (.375" bore) platforms with a 1/2X28 thread pitch. Installation is recommended using Rocksett at 20-25 ft-lbs of torque to ensure a secure fit. Product Highlights Plan B compatible taper-then-thread design ensures repeatable lockup and a proper seal with suppressor adapters Built from 17-4 Stainless Steel with a Nitride finish for superior corrosion resistance and lasting durability 1/2X28 thread pitch fits .223-9MM (.375" bore) platforms for broad compatibility Milled 13/16" flats allow for easy and secure installation; recommended with Rocksett at 20-25 ft-lbs torque Fully machined in-house at KAK Industry for precise tolerances and consistent quality Specs Brand: KAK Industry MPN: 410-2103-002 UPC: 811163036665 Thread Pitch: 1/2X28 Bore Size: .375" (.223-9MM) Overall Length: 1.850" Material: 17-4 Stainless Steel Finish: Nitride Color: Black Milled Flats: 13/16" Compatibility: Plan B Suppressor Hubs Recommended Torque: 20-25 ft-lbs Recommended Installation Compound: Rocksett Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.