I like the looks of the MG locks, they cock really easy & smooth, and the bolster is Thicker on them which is a big Plus to be as it gets the mainspring off the barrel (wish they all did that), and when you cock them, the sear arm stays in the Same Place on off, half cock, and full cock position.......
I have only used 1 on a rifle & that was about 3-4 years ago when they made the ? second batch of them. The customer is a collector & he has never fired it. So I cannot say how well the MG locks hold up, as I use mainly Chambers locks because I am confident in them & have had good success with them.
You can purchase the MG locks from Tip Curtis or R.E.Davis company, should you wish to try one.