Kinda works - KynSHOT AR-15 .223/5.56mm Buffer for High Performance

So got this to use with radial delay blowback 9mm in 5 in barrel. This is the one suggested to use. Works sometimes but most the time will not lock bolt to the rear. This is with standard buffer tube and spring. In super safe mode. It was a little less punchy and more controllable. Where it did shine was suppressed and supersafe with flat wire spring.went from almost locking back to 100% but still not as nice as mpx running super safe.