Lone Star Armory TX4 Standard Complete Upper Receiver

LSA TX4 Standard Series

The plug-and-play TX4-S Complete Upper Receiver Enhanced (CURE) has been meticulously created, tested, and fielded for those seeking a versatile, reliable, accurate, and hard-use turnkey solution to quickly upgrade and enhance an existing complete lower receiver.

The TX4-S CURE features a forged receiver with a forward assist, serving as the foundation for an out-of-the-box rifle upgrade package that guarantees match-grade accuracy and proven reliability (1 MOA or better with competent ammunition).

TX4-S CUREs are tuned in-factory using a Lone Star Armory TX4 test rig and are shipped with a tune pack that includes the appropriate buffer spring and weight. This tuning results in reduced felt recoil and increased reliability and service life.

All Lone Star Armory platforms, including the TX4-S CURE, are Berry Amendment-compliant, manufactured and assembled entirely from American-designed and American-manufactured components in the United States for civilian, law enforcement, and military customers.

NOTE: A $50 surcharge for pinning and welding 14.5″ barrels applies, including the cost of a Dead Air muzzle device.

TX4 Series CUREs are built-to-order with a 2-3 week projected lead time from order to shipping. As these are non-FFL items, they can be shipped directly to most mailing addresses. 

Before purchasing this product, please ensure that you are in compliance with all local, state, and federal laws and regulations, including the National Firearms Act (NFA). The use of this product in conjunction with a lower receiver may be subject to NFA regulations, which may require registration and payment of a tax. It is the buyer’s responsibility to understand and adhere to these legal requirements. Consult with a legal expert or your local Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) office for guidance on NFA compliance.

Complete Upper Receivers are built-to-order with a 2-3 week maximum lead time from order to shipping.

The GWOTX4 Complete Upper Reciever is proudly backed and supported by LSA’s Forever Warranty. 

Specifications:

• 5.56 NATO: 14.5″ P/W, or 16″ Hanson profile, nitrided 4150 Chrome Moly Vanadium Steel barrel
• Mil-Spec hard anodizing, black finish
• BCG: LSA TX16 Mil-Spec BCG with Sprinco Extra Power 5-Coil Extractor Spring
• Midlength gas system, tuned with Sprinco buffer springs and buffer.
• Mil-Spec Charging Handle
• LSA Mil Spec Trigger System
• Midwest Industries MLOK free-float handguard