Hayes Arms has introduced the Firebird improved FRD, a Force Reset Device for AR-15s featuring one-piece tool steel internals and easy drop-in installation without trigger modifications. It functions best with “low shelf” ARs, is incompatible with high shelf guns, and has varied compatibility with “denial island” lowers.
Hayes Arms states “Force Reset Device for the AR-15 improved 1 piece, tool steel internals Super easy drop in installation no trigger modification required may require an h2 or h3 buffer weight The 3rd position only works with the selectors we sell here “The terminator” design is built best to work with “low shelf” Ars, they will work with m16 cut lowers as well. The terminator is incompatible with high shelf guns. It has mixed compatibility with “denial island” lowers, some will drop in and some may need serious modification to the actual device to work correctly.”
Learn more about Hayes Arms https://hayesarms.com/