You can find the B5 Systems Enhanced SOPMOD Mil-Spec Stock Gray here.

The B5 Systems Enhanced SOPMOD stock was designed for Special Operations forces and has many features that troops and serious shooters demand. The stock is made of reinforced polymer and is designed to provide an improved cheekweld for comfort and consistency. The stock features two waterproof storage compartments that run the length of the stock and can hold 2 AA or 3 CR-123 batteries. The streamlined design resists snagging on clothing, load-bearing equipment, or the environment. The stock latch allows easy adjustment of the length of pull. The stock has an anti-slip rubber recoil pad to keep the weapon on the shooter's shoulder, an ambidextrous stainless steel QD sling swivel mount, and two molded 1.25" wide sling slots. Fits Mil-Spec M4-type receiver extensions.

Color: Gray
Height: 4.9"
Length: 7.4"
Weight: 11.8oz