The Tandemkross ADX receiver stands above its competitors with numerous patented innovations. Most prominent among these is the left-side charging handle, allowing easy charging and bolt manipulation with your support hand without disrupting your sight picture or breaking your firing grip. The charging handle is articulated for easy bolt lock-back functionality as well. With the handle pulled back, simply lift the charging handle up into the steel-reinforced locking notch and the bolt will hold open. Gone are the days of holding the bolt back while also trying to manipulate a separate element in order to lock the bolt open. To close the bolt, simply swipe the handle down and out of the locking notch with a swift, satisfying slap.The ADX receiver features a removable back cap that greatly simplifies removal and reinstallation of the bolt and charging handle. While competing options require you to fully compress the recoil spring assembly to remove or install the bolt under substantia...