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$5,100.00
2 in stock
Conversion Time: 6–10 Weeks | Hand-Built Precision | Made in the USA
This conversion is STRICTLY for MP5K variant (K-length) receivers only.
❌ DO NOT purchase this conversion if you have a full-size MP5
Full-size MP5 platforms require our MP5 to MP5SD Conversion, which is a different system.
✔ MP5K / SP5K / AP5-P / PTR 9KT → Correct product
❌ MP5 / SP5 / AP5 / PTR 9CT → Incorrect product
Please confirm your platform before purchasing.
If you have a K variant MP5 platform, this is the conversion you need.
✔ HK MP5K / MP5K-N
✔ HK SP5K / SP89
✔ Century Arms AP5-P / AP5-M
✔ PTR 9KT
✔ Zenith ZF-5P / Z-5P / Z-5K
✔ POF MP5K variants
✔ Dakota Tactical D54K variants
✔ Omega / TPM / RDTS / Brethren K builds
✔ Other MP5K pattern clones (non-monolithic)
📌 If it is a K-length receiver—this is the correct conversion.
This is a full MP5K SD conversion service.
You will send in your MP5K upper receiver, and we convert it into a true integrally suppressed MP5K SD system.
Due to the design of the K platform, these conversions require:
✔ Structural modification
✔ Component grafting
✔ Additional system integration
Your platform is hand built, fit, grafted, and tested by one gunsmith.
The MP5SD platform is legendary for a reason—exceptional suppression, smooth recoil impulse, and unmatched shootability.
The Ronin Arms MP5K SD Conversion brings that same performance to the K platform.
This is a true system transformation, not a basic modification.
Every conversion is completed under our core philosophy:
“Accept No Imitations. One Gun. One Gunsmith.”
✔ No shortcuts
✔ No drop-in kits
✔ No universal solutions
✔ True MP5K Integrally Suppressed System
✔ MP5SD Ported Barrel Technology
✔ Titanium suppressor engineered for SD performance
✔ Hand built, fit, and tested
✔ Engineered specifically for K platforms—not adapted
The MP5K platform requires additional engineering and fabrication to properly run an SD system.
✔ Components must be grafted into the receiver structure
✔ System must be re-engineered for proper function
✔ Additional tuning and alignment is required
This makes MP5K conversions:
✔ More complex
✔ More labor intensive
✔ More time consuming
We do not shortcut this process—because performance depends on doing it right.
✔ Precision ported for SD performance
✔ Allows 115gr and 124gr ammunition to run subsonic
✔ Eliminates the need for subsonic ammunition
✔ Optimized for reliability and accuracy
✔ Grade 5 Titanium (6AL-4V)
✔ Approx. 8” length | Approx. 9.7 oz | 1.65” diameter
✔ Full-auto rated
✔ Designed to run 40–50K rounds before cleaning is needed
✔ Suppression improves as carbon builds
✔ Optimized gas flow for reduced backpressure
✔ Components are grafted and fully integrated into your platform
✔ System tuned specifically to your receiver
✔ Built as a complete SD system—not separate parts
✔ Locking piece configuration is platform dependent
✔ Adjusted as needed for proper timing and cycling
✔ Some platforms already have correct geometry
All tuning is completed in-house as part of the full system.
Every conversion is fully refinished before it leaves our shop.
✔ Stripped, prepped, and refinished after all work is completed
✔ Returned in HK Black professional finish
✔ Corrosion-resistant and built for long-term durability
This is not partial work or touch-up.
Your platform is returned complete, uniform, and finished the right way.
✔ Full disassembly and inspection
✔ Structural grafting and modification
✔ Barrel installation and alignment
✔ Suppressor integration and system fitment
✔ Full refinish in HK Black
✔ System tuning and adjustment
✔ Live-fire testing before return
Each conversion is completed by one gunsmith from start to finish.
✔ Upper receiver
✔ Bolt carrier group (recommended)
✔ Printed order receipt
🚫 Do NOT send extra parts (stocks, optics, etc.)
✔ Suppressor shipped to your FFL/SOT
✔ Converted upper returned directly to you
✔ ATF Form 4 completed through your FFL
All conversions are custom-built to order.
❌ No cancellations
❌ No returns
❌ No refunds
Please confirm compatibility before ordering.
This is not a basic upgrade.
This is a true MP5K SD conversion, engineered to bring full SD performance to a compact platform.
If you own a K variant—this is the conversion you need.
“Accept No Imitations. One Gun. One Gunsmith.”
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