The butt stock, trigger guard and the forearm have been taken off the crossbow to make it lighter. The trigger has been elongated. Just stuffed an old aluminum arrow onto the trigger. Put some plastic inside the arrow shaft and heated it on to the trigger. Also made a handle on where the butt stock went. In the picture right below my chin. This is how I aim up and down, left and right. The crossbow is mounted on a window scope mount. The scope mount is mounted onto a homemade frame that is attached to my wheelchair. The tube that you see is a hands-free grunt tube.