The Spikes Tactical SFT50M4 flat top stripped upper is a clean, mil-spec foundation for building or converting an AR-15 on your own terms. Built from 7075-T6 aluminum and finished in hard-coat black anodize, this upper receiver handles the demands of the range, competition, or duty without flinching. Because it's stripped—no bolt carrier group, charging handle, or internals included—you control every component that goes into your rifle, whether you're assembling a dedicated caliber conversion, a competition build, or a backup upper for your existing platform.
Spikes Tactical backs their reputation on quality and value. This upper uses the same spec and materials as their factory builds, which means you're not compromising on durability or fit. The forward assist and ejection port door are both included, keeping you out of the parts bin for the basics. The flat top Picatinny rail gives you clean real estate for any optic or sight setup you choose.
A stripped upper is ideal if you already have a lower receiver on hand, or if you're planning to swap uppers on an existing lower for a different caliber or configuration. The multi-caliber designation means this receiver will accommodate standard AR-15 bolt carrier groups and barrels in common rifle calibers—verify your specific barrel and BCG compatibility before assembly. Whether you're a builder who likes to spec every detail or a shooter adding flexibility to your arsenal, this upper delivers mil-spec reliability and precision without the price tag of a complete assembly.
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