Yankee Hill Machine Resonator .300 BLK Integral Upper
Complete .300 Blackout upper receiver with pinned-and-welded Resonator suppressor, 9.1" barrel, M-LOK handguard, and low-profile gas block. Single tax stamp required. Full-auto rated.
Yankee Hill Machine Resonator .300 Blackout Integral Upper Receiver
The Resonator Integral represents a practical solution for shooters seeking a compact, suppressed .300 Blackout platform. This complete upper receiver assembly combines a 9.1" barrel with a permanently attached Resonator suppressor, resulting in an overall length just exceeding 16 inches—keeping you within the legal framework of a single tax stamp.
What's Included
- Resonator Sound Suppressor Assembly with 17-4 stainless steel and cobalt-6 blast baffles
- Flat Top A3 Upper Receiver (mil-spec compatible)
- 9" M-LOK Handguard for modern accessory mounting
- Low-Profile Suppressor Gas Block designed to reduce blowback and optimize cycling
- Black-plated gas tube
Key Specifications
- Caliber: .300 Blackout
- Barrel Length: 9.1"
- Overall Length: 23.5"
- Weight: 3.3 lbs
- Suppressor Diameter: 1.5625"
- Sound Rating: 127 dB with subsonic ammunition
- Rating: Full-auto rated construction
Important Notes
This upper receiver does not include a bolt carrier assembly or charging handle—you'll need to source these separately to complete your rifle. The integral suppressor design and optimized gas system make this an excellent choice for subsonic .300 Blackout shooting, whether for hunting, training, or suppressed shooting sports.
The M-LOK handguard provides modern mounting options for lights, lasers, and other tactical accessories.
