Steinel 12.7x42 600gr LFNGC 20rds Nickel

The Steinel 12.7x42 600gr LFNGC is a specialized subsonic .50-caliber cartridge engineered for suppressed AR-platform rifles chambered in 12.7x42 — think of it as the big-bore answer to .300 Blackout. Running a 600-grain lead-free, non-gas-check bullet at subsonic velocities, this load is purpose-built for maximum suppressor performance and deep, quiet hits downrange.

The 12.7x42 cartridge fits standard AR-15 lowers and uses a modified upper receiver, delivering a massive .50-caliber projectile without the bulk of a .50 BMG platform. At subsonic velocities, the 600gr LFNGC bullet produces exceptional terminal performance for hunting and close-range applications while keeping the sound signature to a minimum when run suppressed.

Steinel loads these on nickel-plated brass cases — offering superior corrosion resistance, smoother feeding, and easier visual inspection for reloaders. The lead-free, non-gas-check bullet design keeps your suppressor cleaner and reduces fouling compared to traditional lead projectiles. 20 rounds per box.

• Caliber: 12.7x42
• Bullet weight: 600 grain
• Bullet type: Lead Free, Non-Gas Check (LFNGC) — suppressor-friendly
• Velocity: Subsonic
• Cases: Nickel-plated brass — corrosion resistant, smooth feeding
• Compatible with AR-15 lower receivers (requires 12.7x42 upper)
• 20 rounds per box
• Ideal for suppressed hunting and close-range applications

In-store purchase only. Ammunition is not available for online shipping. Available at Glenwood Springs Outdoors, 831 Grand Ave, Glenwood Springs, CO.