Xanthos-Lite Large Frame Receiver Set

Product Description

The 2A Armament Xanthos-Lite Large Frame Receiver Set is a matched upper and lower receiver set built for 308 AR platform builds. This serialized receiver set serves as the foundation for a custom large-frame rifle.

Large frame receiver sets in 308 offer the modularity of the AR platform at rifle calibers. The Xanthos-Lite bridges the gap between function and weight for builders looking to assemble a precision or hunting rifle.

Whether you are building your first 308 AR or upgrading from a standard forged set, the Xanthos-Lite gives you a starting point engineered for the demands of large-caliber platforms.

Key Facts

• Brand: 2A Armament
• Model: Xanthos-Lite Large Frame Receiver Set
• SKU: 2A-LFRS-1
• Platform: Large frame 7.62/308
• Category: Serialized stripped lower receiver set

Building in 308 vs 5.56

Large frame receivers designed for 308 Winchester and 7.62 NATO require wider magazine wells and reinforced dimensions compared to standard AR-15 receivers. The Xanthos-Lite is sized to accept double-stack 308 magazines and handle higher chamber pressures.

When you build on a 308 platform, bolt carrier group compatibility and buffer system specs differ from the 5.56 you may already know. Check your parts list carefully or send us a message to confirm compatibility with your planned build.

What You Need to Complete the Build

A stripped receiver set is the serialized starting point. You will source a lower parts kit, trigger assembly, buffer system, upper parts kit, barrel, handguard, bolt carrier group, charging handle, and furniture separately.

Because this is a large frame set, standard AR-15 parts will not fit. Plan your component compatibility before ordering. Our stripped lowers in 7.62/308 category page lists other options if you need just the lower.

FFL Transfer and Gunsmithing at Western Sport

Owner and gunsmith Lance Rankin handles transfers and build questions on site.

Because the lower receiver is the serialized component, it ships to our FFL where you complete a 4473 background check. Send us a message to confirm the transfer process or ask about parts compatibility for your build.

Frequently Asked Questions

Q: What does the Xanthos-Lite receiver set fit?

A: The Xanthos-Lite Large Frame Receiver Set is designed for 308 Winchester and 7.62 NATO builds on the large-frame AR platform. It requires large-frame specific parts including bolt carrier groups, barrels, and magazine wells sized for double-stack 308 magazines. Standard AR-15 components will not fit.

Q: Is this receiver set compatible with standard AR-15 parts?

A: No, large frame receivers in 308 require their own bolt carrier groups, barrels, buffer systems, and lower parts kits. The magazine well and bolt face are dimensioned for 7.62 NATO cartridges. Confirm all parts compatibility before ordering or send us a message for guidance.

Q: Do I need an FFL transfer to buy this receiver set?

A: Yes, the lower receiver is the serialized, regulated component. It ships to Western Sport or to another FFL of your choice. You complete ATF Form 4473 and pass a NICS background check before taking possession.

Q: How does the Xanthos-Lite compare to other large frame receiver sets?

A: The Xanthos-Lite name suggests reduced weight compared to standard forged sets, a priority for builders looking to shave ounces on a hunting or precision rifle.

Q: What is the difference between a stripped lower and a receiver set?

A: A stripped lower is the serialized lower receiver only. A receiver set includes both the matched upper and lower receivers with no internal parts installed. You still need to source trigger groups, bolt carrier groups, barrels, and furniture separately. Browse our lower receivers category to compare options.

Additional information