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Not much to say about a castle nut. Inexpensive, threaded on to my Strike buffer tube easy and, fit the standard castle nut wrench correctly. Don’t overspend on at his part, this one works great without a big price tag.
I used this product in my Aero Precision lower with my Strike Industries Flip Switch. I lubricated it with aircraft grade grease when installed and it provides a strong and positive safety selection. Looks good, too bad you can’t see it when installed.
The threads are uniform, it fit my Aero Precision lower and my KAK castle nut no problem. There isn’t much else to say, my Armaspec Stealth Recoil Spring fits perfectly in the tube and my Magpul CTR stock lock positively in the detents. The color is uniform and matches my other Strike Industries blue parts.
The parts fit tightly in my Aero Precision lower. The switch moves smoothly and snaps into position very positively. I did lubricate the switch with grease and gun oil before installing. It is a very tight fit over the trigger so it takes some dexterity to get it into place. The color is solid and uniform with my other blue Strike Industries parts.