Ronin Arms™ MP5SD Integrally Suppressed Conversion

Build Time: 3-5 Months | Hand-Built Precision | Made in the USA

Transform your full-size MP5 into a true MP5SD with modern Ronin Arms™ engineering. This is not a cosmetic upgrade or sleeve-style suppressor — this is a true integrally suppressed MP5SD conversion, built to factory-correct standards with modern materials and precision craftsmanship.

🔥 The Ultimate MP5SD Conversion — Built the Right Way

The HK MP5 is legendary, but for true suppression, smooth recoil, and reliable subsonic performance, the MP5SD configuration stands alone.

Ronin Arms™’ MP5SD Integrally Suppressed Conversion transforms your standard full-size MP5 into a precision-engineered SD system featuring a titanium integral suppressor, optimized ported barrel, and authentic SD architecture — all built under our One Gun. One Gunsmith. philosophy.

Every MP5SD conversion is hand-built in the USA, TIG-welded at all critical stress points, live-fire tested for function and suppression, and final-inspected before release.

This is a professional-grade MP5SD conversion trusted by collectors, professionals, and serious enthusiasts.

✅ Why Choose Ronin Arms™ for Your MP5SD Conversion?

When you choose Ronin Arms™, you’re investing in true SD performance, not shortcuts.

✔ Factory-correct MP5SD design with modern engineering enhancements
✔ Titanium integral suppressor technology
✔ Smooth, predictable recoil impulse
✔ Reliable cycling with standard ammunition
✔ Precision craftsmanship backed by real testing — not marketing claims

❗ MP5SD Compatibility — READ BEFORE ORDERING

Ronin Arms™ SD conversions are compatible with full-size MP5 receivers and full-size MP5 clones including HK MP5 full-size models, HK SP5, AP5 full-size variants, Zenith full-size ZF-5 series, MKE full-size models, PTR full-size models, POF MP5 full-size, Dakota Tactical D54 builds, and other non-K full-size MP5 builders.

General Rule: If it is a full-length MP5 receiver (not a K-model), it is compatible.

Not Compatible — K Receivers & Variants

HK MP5K and MP5K-N, HK SP89 and SP5K, AP5-P and AP5-M, PTR 9KT and all K variants, Zenith ZF-5P / Z-5P / Z-5K, POF MP5K variants, and all PDW, Micro, K, or K-N receivers cannot be converted to an SD system.

🔧 What’s Included in the Ronin Arms™ MP5SD Conversion

🗡️ 12” Katana Titanium Integral Suppressor (NEW for 2025)

Designed specifically for Ronin Arms™ SD platforms.

✔ Aerospace-grade titanium construction
✔ Elite-level real-world suppression
✔ Estimated service life of 40,000–50,000 rounds
✔ Maintenance-free ultrasonic-compatible design
✔ Balanced for full-size MP5 builds

🔩 6.75” MP5SD Ported Barrel

Engineered to deliver true SD performance without specialty ammunition.

✔ Precision porting converts 115gr and 124gr ammunition to subsonic velocities
✔ Eliminates heavy subsonic loads
✔ Professionally installed and head-spaced
✔ Optimized for reliability, accuracy, and longevity

⚙️ Additional Authentic SD Components

• SD barrel shroud & cover — correct MP5SD profile
• SD cocking tube & support — TIG-welded for strength
• High-temperature sealing ring — improved efficiency and reduced fouling
• 120° SD locking piece — smooth recoil impulse
• SD front sight with sling loops — functional and historically correct

⚠️ Ammunition Requirements (IMPORTANT — READ CAREFULLY)

The Ronin Arms™ MP5SD system is engineered around standard-pressure ammunition. Unsupported ammunition will cause poor performance and excessive fouling.

✅ Approved Ammunition

• 115gr 9mm ball
• 124gr 9mm ball

These loads are intentionally slowed by the SD ported barrel to achieve consistent subsonic performance.

❌ Ammunition NOT Supported

Do NOT use the following ammunition types:

❌ 147gr ammunition or heavier
❌ Synthetic, polymer, or frangible projectiles
❌ Coated or plated bullets
❌ Subsonic-labeled ammunition
❌ Reloads or non-SAAMI-spec ammo

📌 Heavier projectiles provide no benefit in an SD system
📌 Synthetic and coated rounds dramatically increase fouling
📌 Improper ammunition can cause cycling issues and accelerated wear

Failure to follow these ammunition guidelines may result in reliability issues and is not covered under warranty.

🛠 MP5SD Conversion Process

1️⃣ Complete disassembly and inspection
2️⃣ Removal of factory barrel
3️⃣ Installation of 6.75” Ronin Arms™ ported SD barrel
4️⃣ Integration of SD components (cocking tube, shroud, front sight)
5️⃣ TIG welding at all structural points
6️⃣ HK factory black finish
7️⃣ Live-fire testing for function and suppression
8️⃣ Final QC inspection before shipment

📐 Technical Specifications

• Suppressor: 12” Katana Titanium (integral)
• Barrel Length: 6.75” Ronin Arms™ Ported SD Barrel
• Locking Piece: 120° SD spec
• Estimated Suppressor Life: 40,000–50,000 rounds
• Suppressor Maintenance: No cleaning needed for 40–50K rounds — system actually gets quieter as carbon builds up; ultrasonic cleaning recommended at extended intervals
• Finish: HK Factory Black

📦 Shipping & ATF Transfer Information

✔ Ship ONLY your barreled receiver and bolt carrier group
✔ Printed order receipt required
✔ Suppressor transferred via ATF Form 3
✔ Original barrel returned after conversion

🚫 Do NOT send extra parts ⚠ $50 handling fee applies; return not guaranteed

⏳ Build Time & ATF Notes

Estimated build time: 2–4 months. ATF processing times are outside our control. Status calls do not accelerate the process.

🔐 Refund & Cancellation Policy — ALL SALES FINAL

All Ronin Arms™ products are custom-built or custom-fit to order. No cancellations, returns, or refunds. NFA items and conversion services are non-refundable.

Please confirm compatibility and ammunition requirements before checkout.

🔓 Experience the True MP5SD

This is not a cosmetic conversion — this is true MP5SD performance, built to professional standards.