MPX-SD K Conversion Service – The Ultimate Integrally Suppressed Upgrade for Your MPX-K
Build Time: 4–6 Weeks | Precision-Crafted | Made in the USA
✅ Why Upgrade Your MPX-K with Ronin Arms?
The SIG MPX-K is one of the most innovative PCC platforms in the world, but when you want whisper-quiet suppression with uncompromising reliability, nothing beats the Ronin Arms MPX-SD K Conversion.
This service transforms your MPX-K into a fully integrally suppressed system, engineered for professional shooters, law enforcement, and serious firearm enthusiasts who demand elite performance.
✔ Industry-Leading Suppression
✔ Flawless Cycling & Reduced Recoil
✔ Live-Fire Tested for Reliability
🔊 Experience the Ronin Arms Difference
At Ronin Arms, we don’t cut corners. Every MPX-SD K conversion is:
✔ Built by one gunsmith, one at a time
✔ Precision-machined for perfect alignment
✔ Finished with live-fire testing to ensure reliability
🛠 What’s Included in the MPX-SD K Conversion?
✔ 5.75″ Ronin Arms Ported SD Barrel
✔ Velocity Reduction Technology – Converts 115gr & 124gr ammo to subsonic speeds
✔ Eliminates the need for 147gr subsonic ammo
✔ Optimized for Accuracy & Recoil Control
✔ 18 x 1 Rear Thread Pitch for perfect fit
✔ 8″ Wakizashi Titanium SD Suppressor – Fully Integrated & Ultrasonic Compatible
✔ Aerospace-grade Titanium Construction – Ultra-light and incredibly strong
✔ Extended Service Life – Built to last 400,000–500,000 rounds under normal use
✔ Low Maintenance Design – No internal cleaning required; compatible with ultrasonic cleaners for external care
✔ Whisper-Quiet Performance – Industry-leading suppression with minimal blowback
✔ Engineered for Reliability – Built for extreme use without compromising performance
✔ Precision Receiver Machining
✔ Ensures flawless barrel and suppressor alignment
✔ Guarantees consistent accuracy and smooth cycling
✔ Expert Barrel Installation
✔ Professionally fitted for durability and reliability
✔ Tested under live-fire conditions before shipping
⚠ Compatibility – Is Your MPX Ready for This Upgrade?
✔ Compatible with SIG MPX Gen1, Gen2, and Gen3 models
❌ NOT compatible with monolithic upper receivers (including Copperhead Monolithic)
🔧 Recommended Handguard Upgrade – Midwest Industries 8″ Handguard
✔ Lightweight & Rugged Construction
✔ M-LOK Compatible for accessories
✔ Optimized Fit for MPX-SD K Builds
Important: If adding accessories, screw length may need modification for proper fitment.
📦 How to Send Your MPX for Conversion
✔ Include Printed Order Receipt – Orders without documentation will be returned
✔ Ship ONLY the barreled upper receiver – Extra parts incur $50 handling fee (not guaranteed to return)
✔ We will process a Form 3 transfer for your suppressor
✔ Complete your Form 4 at your FFL
🔊 Suppressor Maintenance & Warranty
✔ Non-Serviceable Design – Rated for 400,000–500,000 rounds
✔ Ultrasonic Cleaner Compatible for external care
✔ Contact Ronin Arms for authorized service when needed
❌ Do NOT attempt disassembly – Tampering voids warranty
💯 Ronin Arms Warranty
✔ Covers defects in materials & craftsmanship
✔ Repair or replacement at Ronin Arms’ discretion
❌ Does not cover misuse, neglect, or unauthorized modifications
⚙ Installation & Removal Guidelines
🚨 DO NOT FIRE WITHOUT THE SUPPRESSOR ATTACHED – Catastrophic damage may occur
✔ Hand-tighten only – Do NOT over-torque
✔ Allow suppressor to cool before removal
⏳ Build Time & ATF Notes
✔ Turnaround Time: 4–6 weeks (quality takes time)
✔ ATF Form 3 Transfer Required – Wait times are beyond our control
⚠ Status calls will NOT speed up the process
🔐 Refund & Cancellation Policy
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No refunds once suppressor Form 3 transfer has been initiated
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All cancellations subject to a 20% restocking fee
✅ Why Ronin Arms MPX-SD K?
✔ True Integral Suppression – Whisper-quiet performance
✔ Extended Suppressor Life – 400K–500K rounds
✔ Premium Titanium Construction – Lightweight, durable, and heat-resistant
✔ One Gun, One Gunsmith – No shortcuts, no compromises
🔥 Upgrade Your MPX-K Today!
Don’t settle for factory performance—unlock elite suppression, precision, and control with Ronin Arms MPX-SD K Conversion Service.
🚀 Experience the future of integrally suppressed firearms.
👉 Order your conversion now and join the Ronin Family!
📩 Questions? Email info@roninarmsaz.com
📌 Tag your build: #RoninArms #RoninFamily
Jeffrey L. –
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!!!!
Bryan F. –
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.
JT –
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!