Ke Arms M4 Stock Assy 5.56mm 3oz

The KE Arms M4 Stock Assembly 5.56mm is a complete, matched rear-end system designed to simplify rifle builds or modernize existing platforms. This purpose-built assembly pairs a mil-spec tube with premium KE Arms components, eliminating compatibility questions and the need to source parts from multiple vendors. The 3-ounce buffer weight strikes a practical balance for 5.56 NATO carbines, managing recoil impulse without introducing felt heaviness or overly soft lock-up.

The assembly includes a billet mil-spec tube as the foundation, paired with KE Arms' matched buffer spring for consistent cycling dynamics. The billet castle nut ensures robust engagement with the tube while resisting loosening under repeated firing. Included components—endplate, buffer, spring, and mil-spec buttstock—are manufactured in the USA, reflecting KE Arms' commitment to domestic production. All parts are assembled as a cohesive system, meaning you avoid the trial-and-error that sometimes accompanies mixing components from different manufacturers.

This assembly suits builders seeking a turnkey rear-end solution and operators upgrading stocks on duty or patrol rifles. Whether transitioning an older mil-spec configuration or finishing a new build, the KE Arms M4 Stock Assembly delivers verified component compatibility and domestic manufacturing. The 5.56mm specification confirms optimization for the most common tactical rifle caliber, ensuring the buffer weight is calibrated for reliable function across standard duty ammunition.

Complete rear-end systems like this reduce build complexity by eliminating the need to evaluate dozens of individual part combinations. The known interaction between KE Arms' buffer, spring, and tube means faster, more predictable assembly and function validation on the range.