The Bravo Company GFSKMOD2RMSFDE is a Mod 2 which is designed to fit seamlessly on Mil-Spec carbine receiver extensions. It is ideally optimized for intermediate length receiver extensions such as MK2, AR10, and A5 models. Reflecting enhanced designs, it significantly improves shooting experience in the prone position while ensuring a snag-free operation. This means you won\'t have to worry about the edges catching or tangling in slings, antennas, or other Personal Protective Equipment (PPE).The kit includes a BCM Stock Mod 2 in Black color, a BCM MK2 Receiver Extension which is approximately 3/4 longer than a standard carbine. It is made from 7076T6 robust material and offers 8 position adjustments, adhering to the Mil-Spec diameter. Furthermore, it includes a Mil-Spec M16A4 Rifle Action Spring, BCM MK2 Mod 1 - T0 Buffer with a weight of approximately 3.8oz, and a BCM EPM4 End Plate that features a mount for Quick Detach (QD) swivel. Lastly, a Locking Nut (Castle Nut) M4 is also encompassed within this kit.