Originally Posted by
polymorpheous
I've bought a lower to SBR, saving the $200 now for the stamp.
Come tax time I will buying an upper for it.
Right now it comes down to the Noveske N4 basic 10.5", (bonus free lower!), and Daniel Defense's 10.3" Mk18Mod1 upper. (LMT may still be an option too.)
Now my understanding is that the gas port diameter plays a huge part in SBR reliability, especially when suppressed.
It is also my understanding that Daniel Defense is now a DOD contractor for the Mk18Mod1 uppers. However I've read that Daniel Defense gas ports are kind of all over the place.
I have one of their 14.5" CHF M4 barrels and it seems over-gassed compared to my buddy's LMT 14.5 M4 barrel. We both run the same weight buffer, and I have a A2X flash hider and he is running a Phantom. I can't see that making a big difference.
Any opinions on Daniel Defense's gas ports on these uppers?