ODIN Works AR-9 H-FRB9 Forced Reset Trigger Heavy Buffer Stainless. 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. Specifications for ODIN Works AR-9 H-FRB9 Forced Reset Trigger Heavy Buffer: Manufacturer: ODIN Works Color: Stainless Fabric/Material: 303 Stainless Steel Gun Make: AR Platform Gun Model: AR-9 Length: 3.25 Weight: 8.6 oz Features of ODIN Works AR-9 H-FRB9 Forced Reset Trigger Heavy Buffer: Forced Reset Trigger Heavy Buffer 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 provided proprietary spring Package Contents: ODIN Works AR-9 H-FRB9 Forced Reset Trigger Heavy Buffer Proprietary Flatwire Spring What firearm models does the manufacturer say ODIN Works AR-9 H-FRB9 Forced Reset Trigger Heavy Buffer is compatible with? The manufacturer suggests that ODIN Works AR-9 H-FRB9 Forced Reset Trigger Heavy Buffer is compatible with AR-9ODIN Works OS-BS-HFRB-9: AR-9 H-FRB9 Forced Reset Trigger Heavy Buffer Stainless