The Spikes Tactical Flat Top Stripped Upper Receiver (brand part number SFT50M4) is the same M4-pattern, Mil-Spec upper Spikes uses on its own factory-built rifles, sold here as a standalone stripped receiver. It’s forged from 7075-T6 aluminum and finished in a durable Type III hardcoat anodizing, and it ships with the forward assist and ejection port door, spring, and rod already installed. At 8.5 ounces stripped, it’s a solid, mil-spec-compatible foundation for a custom build, though you’ll need to add a charging handle, barrel, handguard, gas block, muzzle device, gas tube, and bolt carrier group to complete it.

Key Specifications

• Forged from 7075-T6 aluminum.
• Finished in Type III hardcoat anodizing.
• Includes the forward assist.
• Includes the ejection port door, spring, and rod.
• Weighs 8.5 ounces stripped.
• Compatible with standard mil-spec AR parts.
• Features a flat-top profile for optics mounting.
• Ships stripped; barrel, BCG, handguard, and other parts are not included.
• The same upper Spikes uses on its own factory-built rifles.

Frequently Asked Questions

Does this upper include a barrel or BCG? No, it’s a stripped receiver; you’ll need to add a barrel, BCG, handguard, gas system, and charging handle to complete it.

What is it made of? Forged 7075-T6 aluminum with a Type III hardcoat anodized finish.

Buy the Spikes Tactical Flat Top Stripped Upper

Start your custom build on the same upper Spikes uses on its own rifles. Order this stripped upper receiver from Spikes Tactical through our AR15 uppers lineup, and our Lubbock, Texas team will get it shipped straight to your door.