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Luth-AR
Overview
The Luth-Ar .223 Mil-Spec AR-15 Carbine Buffer Tube Assembly is designed for use in carbine-length builds, featuring a Mil-Spec buffer tube that ensures compatibility with a wide range of AR-15 components. This assembly includes all necessary parts for installation, providing a reliable foundation for the cycling of your firearm. It is commonly found in standard carbine builds, making it a practical choice for those looking to assemble a dependable rifle.
Builders on GunPartPicker first added the Luth-AR .223 Mil-Spec AR-15 Carbine Buffer Tube Assembly to a build in February 2026.
It was in stock most days in August 2026, and today 5 of the 6 retailers we track have it in stock. It dipped to $40.28 at Optics Planet for a stretch in August 2026, under its usual $41.99 to $48.83, so sales do come around. Buying today, the lowest price is $41.99 at Brownells.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
We ranked every buffer tube assembly by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Buffer Tube Assembly Guide →Check it against the live catalog:
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