Incorporating several patented innovations, the BPR1™ is at the heart of the OSS System. This device controls expanding gases in a way never before performed. This control allows for the “tuning” of every device to the intended weapon’s operating system, barrel length, and caliber. Controlling the expanding gases, instead of simple baffle trapping, eliminates up to 95% of the back pressure created by traditional suppressors. Integral to the BPR1™ capture and control internal design is a patented self-tightening function. Every time you fire the weapon, the device tightens, it is impossible to loosen a BPR™ through shooting The BPR1™ Over The Barrel suppressor offers several mission enhancing capabilities. The difference being OTB allows us to add minimal length to your weapon, 3.9″, and transfers the axis point of your weapon back towards the center point, making it easier to control/drive your weapon. Essentially, providing added capability with far less change to the balance each shooter is accustomed too with their weapon The BPR1™ is also multi-caliber. For example, you can purchase a FHMB (Flash Hider Muzzle Brake) in any caliber from 5.56 through 7.62, and attach the BPR suppressor to every FHMB caliber. THE FHMB IS NOT A SUPPRESSOR COMPONENT The length of the BPR1™ is determined by the mission-specific signature reduction requirements, caliber and weapon system. The Signature Reduction Module as the name implies, this device was designed and engineered specifically to reduce visual and sound signature. The SRM™ is placed in line after the BPR™. The SRM™ can be built to achieve whatever signature level reduction is necessary. Generically speaking for a standard M4, an SRM™ 4 will bring the decibel level well below ear safe. As with all OSS modular components, it is for the operator to decide which components offer the greatest advantage for each mission or operational environment. The size of the SRM™ is determined by the mission-specific signature reduction requirements ranging in length from 2.3 to 5 inches. As with the BPR, each SRM is caliber convertible and can be used with your BPR on multiple weapon platforms. This capability also allows for the use of all types of training ammunition. This BPR and SRM combo is chambered for .223/5.56
Specifications
- SKU: OSS_BPR_SRM556
- Category: Suppressors / 5.56 NATO
- Brand: Radical Firearms
- Origin: Stafford, Texas, USA
Why Radical Firearms
Every barrel, upper, and rifle leaving Stafford is built on equipment Radical Firearms owns — not outsourced. Button-rifled CMV barrels, nitride-treated bolts, forged 7075-T6 receivers, and Melonite-coated gas blocks. The same parts we run on our own rifles, sold direct without the price creep of a three-tier distribution chain.
Ships Nationwide
This product ships direct from our Texas facility to any FFL dealer in all 50 states. NFA items (suppressors, SBRs) require Form 4 processing through the transferring dealer.
FFL Transfer & Firearms Laws for OSS Operators Suppressor System BPR and SRM 5.56 Core
All firearms, including the OSS Operators Suppressor System BPR and SRM 5.56 Core, must be shipped to a licensed Federal Firearms License (FFL) dealer. You will be required to complete a background check and any necessary paperwork before taking possession.
How It Works
- Place your order online.
- Provide your preferred FFL dealer information.
- We ship the firearm directly to your FFL.
- You complete the background check and pickup at the FFL.
Legal Compliance
We comply with all federal and state firearm laws. It is your responsibility to ensure the OSS Operators Suppressor System BPR and SRM 5.56 Core is legal in your state. Some states may have restrictions on certain firearm models or features.
Helpful Resources
Need assistance? Contact our Miami store for help with FFL transfers and firearm compliance.
Frequently Asked Questions About This Product
Why buy OSS Operators Suppressor System BPR and SRM 5.56 Core from Miami Shooters Supply?
We’re a trusted firearms dealer offering fast shipping, competitive pricing, and 100% compliance with U.S. federal firearm laws. All orders ship from our licensed facility with full tracking and expert customer service.
Where can I buy OSS Operators Suppressor System BPR and SRM 5.56 Core?
You can purchase this item directly on our website and have it shipped to your local FFL dealer. You can also visit us in-store in Miami, Florida.
Is OSS Operators Suppressor System BPR and SRM 5.56 Core available now?
Availability is shown live on this page. If the “Add to Cart” button is visible, this item is currently in stock and ready to ship.
What category does this product belong to?
This product is listed under: 5.56 NATO, Suppressors.
What tags or features does this product have?
Key features and tags for this product include: 1980, Radical Firearms.
Is this product legal in my state?
It is your responsibility to ensure this item is legal in your state or locality. We ship only to valid FFL dealers in compliance with U.S. laws. Always check your local regulations.




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