The Spike’s Tactical 5.56 Complete Upper, 14.5in Barrel, M-LOK Rail (brand part no. STU5050-CQ2D) is a complete AR-15 upper receiver group chambered in .223 Rem/5.56 NATO, sold with no lower receiver included. Spikes Tactical builds its complete upper assemblies to arrive inspected, tested, and ready to drop in and go straight to work. Every built upper carries the same tolerances and attention to detail Spikes uses on its complete rifle builds, and each one is test-fired at the factory for a function check before it ever leaves the building. The 14.5-inch barrel and free-float M-LOK rail give the upper a compact, maneuverable profile suited to close-quarters use once mated to a compatible AR-15 lower.

Key Specifications

• Chambered in .223 Rem/5.56 NATO, compatible with both cartridges.
• Runs a 14.5-inch barrel, sized for a compact, maneuverable AR-15 build.
• Built as a Complete upper receiver group, ready to mate to a compatible AR-15 lower.
• Test-fired at the factory for a function check before leaving Spikes Tactical’s facility.

Frequently Asked Questions

Does this upper include a lower receiver? No, this is an upper receiver group only; it ships without a lower receiver and must be mated to one separately.

Is a 14.5-inch upper regulated as a short-barreled rifle? No — sold alone as an upper receiver group with no lower or stock attached, it is not a regulated firearm; a barrel under 16 inches only triggers SBR/NFA rules once assembled onto a lower receiver with a shoulder stock.

Is this upper tested before it ships? Yes, Spikes Tactical test-fires and function-checks every complete upper at the factory before it leaves.

Buy the Spike’s Tactical 5.56 Complete Upper, 14.5in

Drop a factory-tested Spikes Tactical upper onto a compatible AR-15 lower and go straight to the range. Browse Schaefer Defense’s AR-15 uppers selection and order from our Lubbock, Texas gun shop for fast shipping.