Looking at rails for building up my Aero M5 Freedom set. At SLR they list DPMS high and DPMS low. What is the difference? And is there anything proprietary about the M5 set I need to know about? I bought the MI lower parts kit.

How about an alternative to the $200 Geisele 308 reaction rod? This Creedmoor will likely be my only large frame build.

https://www.slrrifleworks.com/