Choate Machine & Tool's MK5 Conventional Stock features Choate's new spacer system which was originally designed for the police and military for use with the latest body armor; however, they work great for the hunter and recreational shooter as well. These stocks have Choate's innovative spacer system and comes with two spacers included which adjusts the length of pull from 13" to 13 3/4". You can lengthen your stock by simply adding new spacers and longer screws. Choate's stocks are made of the finest materials available and carry a lifetime warranty.