Spike's Complete Lower M4 Stk(color)

The Spike's Complete Lower M4 Stock is a fully assembled AR-platform lower receiver engineered for shooters who demand mil-spec reliability without compromise. This complete lower comes ready to accept any standard AR-15 upper receiver and serves as the serialized foundation for custom rifle builds, competitions, and duty-level applications where component quality directly impacts performance under pressure.

Built around a mil-spec buffer tube and ST-T2 tungsten heavy buffer, this lower assembly handles recoil management efficiently across intermediate and rifle cartridges. The collapsible stock allows rapid length-of-pull adjustment—critical for operators transitioning between tactical gear configurations, body armor profiles, and individual shooting positions. Weighing 2.88 lbs, the complete lower integrates seamlessly into carbine-length and mid-length builds without adding unnecessary mass. Spike's Tactical construction ensures hammer and trigger function remain consistent across thermal cycles and extended use, a priority for shooters in variable environments.

This lower receiver suits competitive three-gun shooters refining their platforms, law enforcement and military personnel building duty rifles within approved specifications, and serious enthusiasts constructing precision AR builds. The collapsible stock design proves especially valuable for shooters managing multiple weapons configurations or working in confined spaces—patrol vehicles, room-clearance scenarios, and variable shooting positions demand that flexibility. Spike's reputation for delivering components at competitive pricing without sacrificing mil-spec compliance makes this complete lower an efficient choice for those building their own rifle systems.