It's an easy swap and will end the argument over whose gas key is staked properly...enough. The only issue I can see with the device is how well it will stay in place. DSA tells me that the dovetail is tightly friction fit just like a dovetail-cut rear site on a pistol. I don't see those falling out all that often, so I think they're good on that point. Using the two six-sided screws won't be a problem since you'll always be able to get one of the six sides flat against the dovetail thanks to the generous torque range for those screws (35-45 inch pounds).
Get a primer stuck in the gas key? It's rare, but if needed, field maintenance of a KeyLoc equipped gas key is no more or less involved than drifting a dovetailed sight from a pistol slide. If you have the tools, it's pretty basic armorer level stuff.
Look for the KeyLoc to go on sale in February for a $25 MSRP. DS Arms also plans to offer these as a bare carrier (no bolt) for $99.99, or bare carrier with sand cuts for $139.99, and finally a bare carrier with sand cuts and NP3 coating for $159.99.
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