Now this is a pistol brace! - SB Tactical SBA3 Pistol Stabilizing Brace for Mil-Spec Extension Platforms

Yes, it doesn't come with a castle nut. But that's an extra nine dollars and doesn't matter to me. What does matter is that it installs quickly and it has an awesome cheek weld. Similar to the SOB i previously had on my pistol but not nearly as heavy and has the added adjustability, without the insane SBPDW price tag. Definitely recommend