The complete detailed techniques of making a nearly factory original select-fire conversion to the M14A1. The conversion unit is a separate, machined art that will, with one simple modification, work on either weapon. The best feature is that absolutely NO modification or machining is required on the receiver. The stock requires a slight modification to accept the basic unit. A great way for Class II manufacturers and Police Military armorers to convert either of these weapons into select-fire is by registering the conversion unit as a machine gun. Please note: Civilians can no longer do Form I conversions on anything pertaining to machine guns. For civilian consumption, this together with all our conversion books, is intended for academic purposes only. To do otherwise would be in violation of the Federal Law! 51/2 x 81/2, softcover, 29 pp.