The handguard arrived yesterday but I didn't get a chance to assemble the upper until late last night.
First impressions are that it is very well made and the machining is beautiful. There are no large Brownells logos, just the Wrenchman logo, patent pending, and the "M" which is a requirement from Magpul in order to manufacture anything MLOK related. There are no T slot markings, which is not important to me but may be to others.
The barrel nut is easy to time, they include a little tool to help but I didn't use it, I just eyeballed it and verified by sliding the handguard over the barrel nut and making sure it aligned perfectly with the upper receiver. Now that it's installed, I gave it the ol' kung fu grip squeeze and there is very little flex to it.
In comparison to the 10" MCMR rail from BCM, the Wrenchman is a little more T H I C C, and is slightly heavier, but not enough to matter. I actually find the additional width to fit my large hands slightly better.
I used to have a plug for getting the MCMR rails for between $130-145, but that source has dried up and they are typically $179.95 most places. It will be another week or two before I'm healed up enough to go put some rounds through it, but if it holds up and I don't experience any shifting of the rail, which I don't think there will be despite not having any anti rotation tabs, this will probably become my go to rail. I certainly won't replace my MCMR with one, but for the price these seem to be a darn good option.
Attachment 43575