Lead & Steel Llc LS300-10.5 300 Blackout 10.50" Government Profile Features M4 Feed Ramps

The Lead & Steel LS300-10.5 is a 300 Blackout barrel built for shooters who want a compact, reliable upper receiver conversion without compromise. At 10.5 inches, this government-profile barrel strikes the balance between the subsonic velocity sweet spot that makes 300 Blackout special and a package short enough for SBR builds, tight spaces, or serious firepower in a handy footprint. The M4 feed ramps ensure reliable feeding across a wide range of ammunition, from heavy subsonic loads to lighter supersonic rounds—a practical detail that matters when you're counting on your gun to work.

Lead & Steel barrels are engineered for the working shooter: someone who runs their rifle hard, trusts it to perform, and doesn't chase hype. This barrel works in any AR-platform upper configured for 300 Blackout, making it a straightforward swap for shooters looking to upgrade, build a new upper, or add versatility to their collection. Whether you're suppressed or running it unsuppressed, the 10.5-inch length keeps things manageable without sacrificing the ballistic advantages that made you reach for 300 Blackout in the first place.

Install it into your preferred upper receiver, mate it to your lower, and get to work. No fuss, no unnecessary complexity—just a solid American-made barrel that does what it's supposed to do.

Key Features

• 300 Blackout caliber—optimized for both subsonic and supersonic loads
• 10.5-inch barrel length—compact profile suitable for SBR and short-range applications
• Government profile—standard geometry for broad compatibility across AR uppers
• M4 feed ramps—reliable feeding with diverse ammunition types
• Drop-in fit for AR-platform uppers chambered in 300 Blackout

Specifications

Frequently Asked Questions

Will this barrel work in my AR-15 upper receiver?

Yes, the LS300-10.5 is chambered in 300 Blackout and will fit any AR-platform upper receiver configured for that caliber. Its government profile is the standard geometry used across the industry.

What's the advantage of the 10.5-inch length for 300 Blackout?

The 10.5-inch length keeps your gun compact and maneuverable while staying long enough to let 300 Blackout loads—especially subsonic ammunition—perform as designed. It's a proven sweet spot for SBR builds and short-range applications.

Do the M4 feed ramps matter for 300 Blackout?

Yes. M4 feed ramps are designed to reliably feed a wide variety of ammunition, from heavy subsonic rounds to lighter supersonic loads. They're a practical feature that reduces the risk of feed-related failures.

Is this barrel suppressor-ready?

The barrel itself has no integral suppressor; however, its 300 Blackout chambering and compact length make it well-suited to suppressed shooting, especially with subsonic ammunition.