Designed to fit MILSPEC buffer tubes. The NBS SOPMOD stock features an excellent cheekweld for optimum shooting positioning. Within the buttstocks frame are two water tight storage compartments for small items. The rubber butt pad provides a non-slip surface for consistent shoulder and cheek placement. Mil-Spec buttstock for AR15 and other models Rubber non-slip butt pad Two watertight storage compartments Stainless steel QD swivel mount Made in the USA Available Colors: Black, Tan, OD Green