It's great! - FAB Defense GL CORE MAG CP - M4 Survival Buttstock w/ Built-in Mag Carrier

I purchased this mostly because of the optional mag option under the stock (they do actually include a 10rd mag with the stock, for anyone wondering!), and it works great, fits me perfectly, and I will likely get another one for my daughter when she's wants to build her own AR!. I do however want to remind anyone that is NOT running a 2" or greater height scope mount, or someone that has never used these types of stocks on an AR, that you will absolutely need a riser to be able to use the adjustable cheek plate, or, of you are not planning to, or wanting to use a riser, the stock without the adjustable cheek plate has a better fit, and more comfort to your face than a spec stock as well. I recommend this to anyone wanting an extra, small mag on hand, but without sacrificing functionality or comfort, and it fits into your shoulder better as well