As I stated in another thread, I'm upgrading two Colt 6920 rifles from a DD 7.0 and 12.0 Omega cheese grater rail to M-LOK.
The rifles will be two of my SHTF rifles, so I'm looking for a rail that will be SOLID when installed with no rotation. Also, I'd prefer a svelte rail if possible. That being said, should I be looking at a rail that mounts to a proprietary barrel nut, i.e., BCM or a two-piece rail that attaches to a standard barrel nut like the Centurion Arms C4?
What are the pros/cons of each system?
What rails should I be considering based upon the above criteria?
I'm currently considering BCM MCMR, Centurion Arms C4, DD Omega M-LOK and KAC URX 4. Would love to try a Geissele Super Modular MK16, but I don't think it'll work with these rifles. Anything else?
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