TX4 Standard Complete Upper Receiver

You don’t need to compromise quality, reliability, or accuracy in an entry-level gun, and the direct impingement TX4 Standard is proof positive of just that. Developed as Lone Star Armory’s base-level small frame system, the TX4-S is designed for those who require a versatile no-frill weapon system that offers tight tolerances, durability, and accuracy out of the box without the need for any further modification.

The plug-and-play TX4 Standard Complete Upper Receiver has been created, tested, and fielded for end-users looking for a versatile, reliable, accurate, and hard-use turnkey solution to upgrade and augment an existing complete lower receiver for a cost-effective price. Utilizing hand-selected components, the TX4-S CUR uses a forged receiver with a forward assist as a foundation for the ultimate rifle upgrade package, guaranteeing match-grade accuracy and proven reliability (1 MOA or better with competent ammunition).

TX4-S CURs 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. Tuning results in less felt-recoil and an increase in reliability and service life.

All Lone Star Armory platforms including the TX4-S CUR 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 $125 surcharge for pinning and welding 14.5″ barrels applies, including the cost of a Dead Air muzzle device.

Complete Upper Receivers are built-to-order with a 4-5 week maximum lead time from order to shipping.
TX4-S CUR does not ship with optic or accessories pictured.

The TX4-S Complete Upper Reciever is proudly backed and supported by LSA’s Forever Warranty. 

TX4 STANDARD CUR SPECIFICATIONS