Accept No Imitations. One Gun. One Gunsmith.
Integral Suppressed Firearms & SD Conversions — Ronin Arms
NEW!
The MPX SD from Ronin Arms transforms the SIG MPX into a fully integrally suppressed system.
Precision-Built. One Gun. One Gunsmith.
At Ronin Arms, every integrally suppressed firearm is built start to finish by a single gunsmith—our founder. Each platform is engineered for performance, accuracy, and refined execution, with every detail carefully shaped, tuned, and inspected by one set of hands.
No firearm leaves our shop unless it meets our highest standard for fit, function, and finish.
About Ronin Arms
At Ronin Arms, we don’t just build firearms—we craft them. Each piece is a testament to precision, performance, and the relentless pursuit of perfection. We are not a production shop. We are a boutique builder, dedicated to creating exceptional, integrally suppressed firearms for those who refuse to settle.


Every build, every conversion, every detail is entrusted to one gunsmith—our founder, an artisan in his craft. His hands shape each firearm with an uncompromising level of skill, ensuring that nothing leaves our shop unless it meets the highest standard: perfection.
Our RA5SD, MP5 and MPX conversions, and the Ronin Edition MPXSD are more than upgrades—they are meticulously engineered solutions, designed

For Those Who Demand Precision
Ronin Arms builds firearms for shooters who understand the value of craftsmanship and expect performance without compromise. Our work is not designed for volume—it is built for those who recognize precision, engineering discipline, and attention to detail.
Introducing the Integral Suppressed RA9 Suppressor System (AR9 platform)
Elevate your shooting experience with the integral suppressed RA9 suppressor system from Ronin Arms. Crafted with precision engineering and innovative design, this system is the pinnacle of firearm enhancement, offering unparalleled performance and precision.
Unmatched Features:
The system features a 12″ Standard Suppressor paired with a 6.75″ ported barrel, meticulously designed for the AR platform. This combination delivers superior noise reduction and enhanced shooting accuracy, ensuring each shot is precise and impactful. Additionally, the system comes complete with 1 wave washer for added convenience during installation.
Streamlined Purchasing Process:
Ronin Arms values your time and convenience. Dealers can email us for exclusive dealer pricing. During checkout, ensure you select an FFL (Federal Firearms Licensee) that permits suppressor transfers (SOT) to avoid additional processing fees ($25).
Exceptional Warranty Coverage:
Your satisfaction and peace of mind are our priority. Ronin Arms guarantees that the suppressor is free from defects in workmanship and materials, meeting or exceeding all manufacturing specifications. Our warranty covers repair or replacement at our discretion. Please thoroughly read all instructions before use to ensure safe handling and operation. Additionally, please note that our suppressors are non-serviceable.
Safety First:
Safety is paramount when using any firearm accessory. Before utilizing the suppressor, always ensure the firearm is unloaded and the safety is engaged. Never attempt to install or remove the suppressor from a loaded firearm. Follow the provided installation and removal instructions meticulously to prevent accidents and ensure proper functionality.
Enhanced Shooting Experience:
Immerse yourself in the world of suppressed shooting with the system. Whether for tactical applications, competitive shooting, or recreational use, this system delivers unmatched performance and precision. With its advanced design and reliable construction, trust Ronin Arms to elevate your shooting experience to new heights.
Order Yours Today:
Don’t miss out on the opportunity to enhance your shooting arsenal. Order the integral suppressed RA9 suppressor system from Ronin Arms today and experience the difference firsthand. Unlock the full potential of your firearm and elevate your shooting skills with confidence. Whether you’re a seasoned professional or a novice enthusiast, the system is sure to exceed your expectations.
Price:
$1,550.00
Gear Up With The Best
What Our Clients Say
Real feedback from real clients, sharing their experiences working with us.
Ryan S
Verified ownerBeing one of the more expensive conversions, I had some high expectations, and Ronin Arms surpassed them. I've watched/read several reviews of conversions from other companies and saw things like the a few supersonic cracks from 115s, leaving the standard cocking tube, no refinish, etc. The work and attention put into my gun was well worth the wait and price. They gave attention to the small details like lining the cocking tube up perfectly, clean welds on the SD cage to spec. As far as the actual shooting, this is the quietest, smoothest MP5 I've shot. I ran 300 rounds of 115gr with no issues, and thanks to their unique porting, it's not filthy at all. Highly recommend.
9 months ago
JT
Reviewer
Also, I would like to thank you and your team for the incredible work you guys did! After shooting the MPX last weekend for the first time since the modifications, I can confidently say it's become my favorite gun quite a statement considering my collection.
I truly appreciate all your help throughout the process.
Wishing you a great day ahead!
11 months ago
Bryan F.
Reviewer
If you don't absolutely LOVE it, there is something wrong with you.
Quality work resulting in superior performance. I would not hesitate to do this again, as a matter of fact I'm debating a second one.
Sound suppression is phenomenal, especially when compared to end of barrel suppression. Night and day; don't want, just get it. You know the saying, buy once cry once.
1 year ago
Jeffrey L.
Reviewer
Purchase to range in less than 30 days during the holiday season. Gun runs flawlessly and is "Hollywood" quiet. I am so impressed with this setup I just bought another MPX and will be ordering the full-size setup. A++++ 5 Stars!
Great Job Brother!!!!
1 year ago
The Ronin Journal
Insights, build breakdowns, and technical discussions from the Ronin Arms workshop. Explore integrally suppressed firearm design, platform-specific performance, and the craftsmanship behind every Ronin build—written for shooters who value precision and purpose.
February 16, 2026
