Quicksteel from United States, FL Public Profile

I've used one of these in my g21 for years now. Great accuracy, durability and fit. The g20 barrel is no different.

I found this is extremely accurate out of a sixteen inch barrel with a 1/10 twist.
Recoil isn't bad and for expansion, it went through a washing machine side and through a gallon water jug inside. It did not penetrate the other side of the machine. Good enough for me.

It arrived in great condition, and looked useful.
My friend told me about them so I thought I'd try one because the design made sense.
First for the 45 version. The spring has to be put into the slide without a guide. The instructions say to use your thumb to guide it in and not to bend it. Well let me tell you it's not easy. And as far as bending the spring, good luck. It took 2 of my friends and myself to get it in. And once it is in the longer spring compresses and is only a coil or 2 longer than the short one is when removed. The best thing they could do is make it a captured recoil spring. At least for the larger calibers.
Even with the shorter spring in it is still a stiff rack back. People with weaker hands won't like it even if they can rack it back.
I'm taking it to the range Day after tomorrow and I'll update the results.
Over all I think it will work well, and with some tweaks it could great.

Although I have only used this on occasion at night when something went bump, It works well after training with it a bit. It is bright enough to see the across street house with no dark spots. Illuminates a wide area for better peripheral views. Seems well built but that is to be tested in the future.