AR MAGLOCK AR-10 Gen 4 Fixed Magazine Lock and Release Solution Without Takedown Pin

The Gen 4 benefits:- New set screw on locking arm, allowing for adjustment to ANY receiver width including billet, composite, or 80% non mil-spec receivers.The benefits:- Allows for "free state" adjustment when traveling outside California. Just reset the set screw to the end of the post and the locking arm will work just like an OEM magazine release button.- Retain your critically important bolt catch- Seamless double feed clearing- Bolt hold back on last round- Fast magazine changes (as fast as OEM mag release button)- Clear access to your safety selector- Easy removal from the receiver to fully open the actionAll AR MAGLOCK locking kits are patented under USPTO patent number: 8,756,845. KingPin is patented under 10,126,078.*Kingpin sold separately