*THIS IS NOT AN NFA-REGISTERED ITEM AND WILL NOT TURN YOUR RIFLE INTO A MACHINE GUN* This new product, when properly installed and used on a serviceable Lightning Link, will reinforce the weak area of the link. Installation may require removing .040 material from the bottom of the upper receiver take-down pin lug and a small amount from the back of the hammer. Installation and use of this reinforcement does not imply or express any liability, guarantee or warranty upon the manufacturer or seller to cover the cost or value of the firearm, firearm accessories or lightning link in the event of accident, loss or breakage of any kind. The Bureau of Alcohol Tobacco Firearms and Explosives has approved the use of this product on legally registered Lightning Links in accordance with the National Firearms Act (NFA). HOWEVER, USING THIS REINFORCEMENT PIECE TO REPLACE ANY PART OF A REGISTERED BROKEN LIGHTNING LINK WOULD CONSTITUTE THE MANUFACTURE OF A NEW UNREGISTERED MACHINE GUN AND WOULD BE IN VIOLATION OF THE NFA. (Ruling #903050:MRC 3311/2005-474) This product is not a Lightning Link, nor is a Lightning Link included with your purchase. Any photos of our product on this website that have a Lightning Link in the photo are only used to show our product on the Lightning Link. The Lightning Link in the photo is not for sale and is not included in the purchase of this product. Detailed instructions and helpful hints included.