The Midwest Industries Side Folding Trapdoor Stock is designed with original AR-180 styling and the additional bonus of ample storage space within. Overall length of pull on typical AR-15 style rifles with picatinny mounting is 13.75a ^2, similar to that on the original AR-180 rifle. Weight of the polymer stock itself is 11.3 ounces. Hinges are supplied to Manticore Arms by Midwest Industries, made of steel, and weigh 6.9 ounces. The hinge can be set up to allow the stock to fold left or right. Hardware and allen wrenches for installation are included. Made from a heavily fiber reinforced polymer the stock buttplate is easily hinged down by pressing a spring loaded plunger on top with a rifle bullet point or small tool. With 8a ^2 of clear length from front to back internally a full size AR-15 cleaning kit with three piece steel cleaning rod will easily fit inside, and the interior width of 1.050a ^2 allows 1.0a ^2 diameter oil bottles to fit. The buttplate measures 1.32...