The LWRC SIX8-A5 Razorback II in 6.8 SPC II (brand part no. SIX8A5RBB16RB) pairs a cold-hammer-forged, NiCorr-treated heavy-profile 16.1-inch barrel with a 1-in-10 twist, delivering more impact energy than 5.56 NATO across all effective ranges while still fitting the same magazine capacity a soldier could carry in 5.56. LWRC finishes this rifle in Burnt Bronze Cerakote with a Razorback magwell engraving, feeds it from a purpose-built Magpul SIX8 PMAG, and threads the muzzle at 5/8×24 for an A2 flash hider. Among AR-platform rifles in the AR rifles category, the SIX8-A5 Razorback II favors shooters who want more downrange energy than 5.56 with reliable, purpose-built magazines.

Key Specifications

• Chambered in 6.8 SPC II.
• Rifled at a 1-in-10 rate of twist.
• Features a 16.1-inch, cold-hammer-forged, NiCorr-treated heavy-profile barrel.
• Muzzle is threaded 5/8×24, fitted with an A2 flash hider.
• Feeds from the purpose-built Magpul SIX8 PMAG.
• Uses fully ambidextrous lower controls, including the mag release, bolt catch, and selector.
• Handguard is a 12-inch scallop-cut rail.
• Grip is a Magpul MOE+, paired with an LWRCI compact stock and QD sling mount.
• Weighs approximately 6.7 pounds.
• Finished in Burnt Bronze Cerakote with a Razorback magwell engraving.

Frequently Asked Questions

Why choose 6.8 SPC over 5.56? It delivers more downrange impact energy while carrying a similar number of rounds.

What magazine does this rifle use? A purpose-built Magpul SIX8 PMAG designed specifically for reliable 6.8 SPC feeding.

Are the controls ambidextrous? Yes, including the mag release, bolt catch, and selector.

Buy the LWRC SIX8-A5 Razorback II 6.8 SPC

More downrange energy than 5.56 with a reliable, purpose-built magazine system is exactly what the Razorback II delivers. As soon as it’s ready to ship, order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.