u/Even_Trip1942

I was looking to swap one of my 556 uppers over to a 300 blackout and I am now stuck between these two barrels. Criterion was my first choice, but then I ran across the Phased Array system. I have found very little information on the Geissele system.

Have any of y’all have tried this barrel before? Thoughts on it compared to the Criterion?

I was looking at the OCL Milkman, but wanted to see if anyone else had something that would beat it. Thanks in advance.

I’m looking for any subsonic ammo recommendations. I know about 147 & 150 grain Syntech, but I’m looking to see if there is anything else out there people enjoy.

I’m running the 20% spring & buffer. I don’t know if that info helps, but I read that low power or low recoiling ammo might not cycle properly if I have that installed.

Thanks in advance.