I have way too many builds to spend $100 more dollars on the next gadget that CA will simply ban. I started off my OLL's with epoxied mags, followed by the Prince 50 kit ($20), skipped the bullet button, but used the Raddlock ($30). When they banned the Bullet Button that left me already with a good bit of $ (more than anyone should have to) invested in going from Prince 50 to Raddlock, so I wanted to devise away of complying that is as inexpensive as possible. Some argue that the Prince 50 kit is still viable, but since it does not necessarily require "disassembly of the action" I don't really agree.
This, however is similar to the Prince 50, but since it's located inside of the Action, you have to disassemble the action to either load the mag from the top, or back out the screw to change the mag, with the action already disassembled. I just use them like the Prince 50, break action top loader unless I go to Free America. At that point it takes only a couple seconds to go back to how the rifle was intended to be, then when returning to Commifornistan only takes a few seconds to go back. All the while, no contraptions, no gimmicks and even now costs under $1 per set screw to outfit a new build.
I also have more builds that would "get" you

, but I haven't shared those yet, lol.