SKU CSSI|YEYHM7135 Category

YHM Resonator .300 BLK Integrally Suppressed Upper Receiver Group .300 Blk 9.1″ Barrel *No BCG or Charging Handle

YHM Resonator .300 BLK Integrally Suppressed Upper Receiver Group .300 Blk 9.1″ Barrel *No BCG or Charging Handle

$1,274.00

3 in stock

The Resonator® Integral comes with a Resonator® suppressor which is pinned and welded to a 9.1” .300 BLK barrel. With a combined barrel/suppressor length of just over 16” this system only requires a single tax stamp purchase.
Includes a lightweight M-LOK® Handguard YHM Mil-Spec A3 upper receiver and a specially designed gas block which reduces blowback and cycle rates.

Does not include Bolt Carrier Assembly or Charging Handle.

  • Caliber:.300 BLK
  • Weight: 3.3lbs
  • Length: 23.5”
  • Diameter: 1.5625”
  • Suppressor Construction: 17-4 Ph SS/Cobalt-6 Blast Baffle
  • Decibel Rating: 127 for .300 BLK subsonic
  • Full Auto Rated

The Resonator .300 Blackout Integral Suppressed Upper Receiver System Includes:

  • Resonator® Sound Suppressor Assembly
  • MR7 M-Lok® 9" Handguard
  • Flat Top A3 Upper Receiver Assembly
    (YHM-100)
  • Low Profile Suppressor Gas Block
    (YHM-9389-SS)
  • Black Plated Gas Tube (YHM-BL-04P)

Additional information

Upc

841812101929

Manufacturer

Yankee Hill Machine

Manufacturer part number

YHM-7135

Shipping weight

4.3

FAQ

BJ Firearms LLC is a federally licensed firearms business focused on providing quality firearms, accessories, and related services while promoting responsible ownership, education, and community engagement.

The company was founded to serve firearm enthusiasts with knowledgeable service, real-world experience, and a commitment to professionalism and safety.

We focus on real experience, personalized service, hands-on product knowledge, and community involvement — not just sales. Our goal is to help customers make informed decisions and feel confident with their equipment.

Yes. We operate as a federally licensed firearms dealer (FFL), following all applicable federal, state, and local regulations.

Yes. We partner with trusted suppliers to provide quality products and reliable sourcing.

Yes. We partner with content creators and industry professionals to provide real-world insights and experiences.

We work with everyone — from first-time buyers to experienced enthusiasts. Education and guidance are a big part of what we do.

We offer firearms, accessories, gear, and related equipment depending on availability and customer needs.

Yes. We help customers evaluate their needs, experience level, and intended use to find the right fit.

Yes. Depending on the request, we can help source specific products or assist with custom configurations.

Yes. We actively engage in hands-on experiences, demonstrations, and community-related firearm activities when possible.

Yes. We support content that helps people learn about equipment, safety, and responsible firearm ownership.

Social Media Posts

Via Vontaes_Gunz

Customer Reviews

“Outstanding customer service.” I had a lot of questions before buying, and they walked me through everything without pressure. Super knowledgeable and easy to work with. You can tell they actually care about their customers.
Verified Customer
“Best experience I’ve had buying gear.” Professional, responsive, and honest. They helped me choose exactly what I needed without overselling anything. I’ll definitely be coming back.
Verified Customer
“Great people, great service.” Very down-to-earth and easy to talk to. They explain things clearly and make sure you understand your options. Highly recommend, especially if you’re new.
Verified customer

BJ FIREARMS LLC

Age Verification Required.

You must be 18 or older to enter this website. By entering this website, you are agreeing to all policies and procedures.