The new SIG HYP rifle—the first direct impingement AR platform purpose-built for 6.8x51mm hybrid ammunition, also known as .277 SIG Fury. This isn’t just another AR-10. The HYP is a premium, reinforced rifle engineered to handle the extreme pressure of hybrid rounds while maintaining a familiar AR feel and footprint.
Developed as a more accessible alternative to the MCX SPEAR, the HYP rifle features steel-reinforced feed ramps and cam path, a beefed-up upper receiver, and a cold hammer-forged, chrome-lined barrel capable of withstanding pressures well beyond 80,000 psi. SIG claims the barrel life will exceed 10,000 rounds, which is impressive for a round this hot.
While it shares compatibility with DPMS-pattern AR-10 lowers, SIG designed the HYP as a complete system optimized for .277 Fury and is not currently offering upper receivers separately.
Key Specs:
Caliber: 6.8x51mm / .277 SIG Fury
Operating System: Direct Impingement
Barrel: 16” Chrome-Lined, Hammer-Forged
Barrel Life: 10,000+ rounds
Receiver: Reinforced upper with steel cam path and feed ramp
Rail System: Free-floated M-LOK with robust 2-bolt mount
Bolt/Carrier: Heavy-duty carrier group built for high pressure
Lower Compatibility: DPMS-pattern (unconfirmed full cross-compatibility)
MSRP: ~$2,000
Availability: Coming in 2025
Designed for shooters who want MCX SPEAR-level performance at a more traditional AR price, the HYP lets you run true next-gen 6.8x51mm ammo in a lighter, more modular package.
