The Spikes Tactical SFT50M4 Flat Top Stripped Upper is a high-quality, forged M4 upper receiver crafted from 7075-T6 aluminum with a durable Black Type III Hardcoat Anodized finish, delivering reliable performance for multi-caliber builds. This stripped upper is designed to accommodate standard M4 specifications while including essential components such as the forward assist, ejection port door, spring, and rod, ensuring a smooth fit during installation. Weighing 8.5 oz, it provides a balance of strength and lightness ideal for service-style setups or custom rifle builds. The upper is finished in a corrosion-resistant black anodized coating and is paired with a clean, no-sights profile that remains optic-ready for buyers planning to install their preferred optics. As a true multi-caliber option, it pairs well with a range of barrels and configurations for hunting, range work, or tactical training. Note that this is a stripped upper and requires a charging handle, barrel, handguard, gas block, muzzle device, gas tube, and BCG to complete, giving you the flexibility to tailor your rifle to your exact specifications with the trusted quality of Spikes Tactical.