I use a knock off of the Magpul M4. It was about thirty bucks. Very good quality, it's every bit as good as the original. The M4 is a two point,convertible to single point. It has two push button quick connect swivels. And for me, the best feature is the quick length adjustment. It allows you to instantly adjust from shoulder length, to use it as a stabilizer for wrapping it around the arm when aiming. With just a pull on the loop. For me the sling mounts were the real issue. I ended up going with buffer tube mount for the rear, since I don't care for the stock mount at the rear. M loc for the front. It carries very comfortably.