The AR-10 CompMag. GEN.2 CA. Compliant. N.Y. Compliant with the simple addition of epoxy over the locking screw. Installs and operates the same as our AR-15 CompMag. Lifetime Warranty. If something ever breaks, we will replace it. 8 Round capacity. Locks into your magazine well with an expandable insert built right into the side of the CompMag. Our unique fixed magazine design creates an ammunition feeding device designed to be contained in or permanently attached to a firearm in such a manner that it cannot be removed without disassembly of the firearm action. Allows you to keep the AR-10 features you love on your rifle. (pistol grip, forward grip, retractable stock, and flash hider). No need to "break your action" or deviate from the normal operation of your firearm to reload. Loads easier than a standard magazine. No heavy spring to push each round against. Will fully load on a closed or open bolt. One screw installation. No holes to drill. No need to modify your firearm. Two minutes to install. Two minutes to remove, should you decide to shoot outside of California. Ultra durable and heavy duty, built to last. 150% to 300% thicker side walls than most polymer magazines. 17-7 Stainless steel magazine spring. CNC turned steel charging handle with glossy black oxide finish. Round counter indicates exactly how many rounds are left in your firearm, including what's in your chamber. Holds the bolt open after the last round is fired. Allows for easy clearing of type 3 malfunctions (such as double feeds). Can be used in California and other restrictive firearm states. Check your local and state laws before ordering.