I like GRSC CQB slings, for many reasons.
www.grsc.com/cqb.htmlThey can use CHEAP stock plate adapters, available anywhere, for $15. They use a sailors snap hook, or the HK style hook to attach. You dont have to buy an extra ERB buckle for each weapon you want to install it on, like the Spectre MOUT. (I have that one... it's good, but not as good as the GRSC)
Also, since they use a standard hook attackment point, you can use the sling with a wider array of weapons/objects, than the dedicated ERB connectors on the Spectre.
Plus, they are 1.5" wide... slightly more comfortable to wear for extended periods than the Spectre gear.
I bought into all the spectre gear hype, got one, paid for the GGG adapters, the extra weapon adapters...etc..etc.. and wnet back to my GRSC. Dont know what I was thinking.