I finally got my hands on one of these Agency Arms rails to take a look at in person. One of the benefits of bringing in a lot of peoples builds is I get to check out all the new accessories without having to pay the price of admission.
I've used a lot of Agency Arms components in other firearms, so I was hopeful for this rail to be one that was actually a win for a change. The rail itself is well made, it does have some significant set backs that aren't entirely Agency's fault, but more along the lines of working around the Benelli M4's ARGO system without making the rail too big.
I'm not a huge fan of the need to disassemble the rail in order to access the ARGO system. This renders the gas system inaccessible in the field unless they happen to have brought a torx bit with them. Basically if something needs screws, this is an armorer level job now and not meant to be messed with in the field.
Most of the MLOK sockets are unusable. Many of the sockets ride so close to the ARGO system that mounted items do not have the clearance to cam lock. I fixed this with a few railscales panels by profiling the cam lock and screw with a concave grinder shape. Thinning the cam permitted the cam to rotate and not make contact with the ARGO system. Still a pain in the ass.
The rail was not removable with several of the railscales in place. The rail would hang up on the cam locks. So the end user would have to remove several of these panels or other devices mounted in order to remove the rail to service the ARGO system.
Ergonomics are better than the Strike Industries or the Surefire M80 rails. Ergonomics sucks compared to the OEM handguard however. Even with premium rail covers like G10 railscales, the OEM wins hands down.
With any rail, you're paying a weight penalty by equipping one. One must consider what benefits you're receiving by adding the part. With the step back in ergonomics and weight penalty you're facing, personally I would recommend using an IWC weapon light mount for your sling and weapon light needs. Placing sling mounts on your handguard is a step back in ergonomics since they tend to interfere with your hand placement. On this build we will be adding an IWC front sling/light mount as well to use the sling mount.
If you have Trypophobia, you probably hate this.
Reprofiled cam lock.
Look at all that clearance to the ARGO plug!