The ODIN Works Heavy Buffer is built to run with Forced Reset Triggers. It offers a simplified, performance-driven approach to blowback PCC tuning, delivering consistent cycling and recoil control without the need for adjustment. Designed to run smoothly on a variety of setups, this buffer achieves increased weight and pairs with an (included) proprietary flat wire spring for reliable operation.Aids in reliable cycling with an FRT in AR-9 platforms, manages recoil impulse, and reduces wear on moving components. *Includes proprietary flat wire spring Features 8.6 oz 303 Stainless Steel Body Includes proprietary flat wire spring Aids in reliable function with a Forced Reset Trigger or a high rate of fire Reduces wear on moving parts Compatible with standard AR-9 platforms Designed for Carbine-length buffer tubes. Must be used with proprietary flat wire spring (included with purchase)