AP5-SD Full-Size Conversion

Not yet rated

(1)

$2,100.00

Only 1 left in Stock!

1 in stock

During checkout, please ensure that you select an FFL (Federal Firearms Licensee) that permits suppressor transfers (SOT). Failure to do so may result in an additional $25 processing fee for us to arrange an eligible FFL on your behalf.
Military and LEO, please contact us to claim your 5% discount.

AP5-SD Integrally Suppressed Conversion by Ronin Arms

Build Time: 3–5 Months | Precision-Crafted | Made in the USA


✅ Why Upgrade Your AP5-SD with Ronin Arms?

If you own a Century Arms AP5-SD, you already have a platform built on one of the most iconic designs in firearms history—the MP5-SD. But what if you could elevate its performance to elite levels, achieving whisper-quiet suppression, perfect cycling, and durability that lasts for decades?

That’s what you get with the Ronin Arms AP5-SD Integrally Suppressed Conversion—a premium upgrade designed for shooters who demand absolute precision and performance.

When you choose Ronin Arms, you’re investing in:
Industry-Leading Suppression Technology
Expert Hand-Fitted Craftsmanship
Premium Components for Maximum Longevity
Rigorous Live-Fire Testing & Quality Control


❌ Models & Configurations We Do NOT Accept

To avoid delays or returns, please note that this conversion is for full-size AP5-SD models only. The following are NOT accepted:

  • ❌ AP5-P (K Receiver Models) – Not compatible with this full-size SD conversion

  • ❌ AP5-SD K (Compact Variant) – See our dedicated AP5-SD K listing for that conversion

  • ❌ Non-Century Receivers or Clone Variants – Only genuine Century Arms AP5-SD is eligible

  • ❌ Damaged, Altered, or Previously Converted Guns – No builds on compromised receivers or previously modified SD platforms

📌 Confirm your model before shipping to avoid return fees.


🔍 What Is the AP5-SD Integrally Suppressed Conversion?

This conversion completely transforms your AP5-SD into a precision-engineered integrally suppressed system, providing:
Superior Sound Reduction over thread-on cans
Perfect Weight Balance & Authentic SD Handling
No Point-of-Impact Shift during suppressed fire
True SD Performance with modern engineering improvements

Perfect for:

  • Tactical Operators & Law Enforcement needing reliability and stealth

  • Home Defense Owners seeking reduced signature and maximum control

  • Collectors & Enthusiasts demanding authentic, high-quality SD platforms


🔥 Key Features of the Ronin Arms AP5-SD Conversion

New for 2025 – 12” Katana Titanium Suppressor

The Katana Titanium suppressor is the ultimate in performance, strength, and weight reduction.

Aerospace-Grade Titanium – Ultra-light, ultra-durable
Long Service Life – Estimated 500,000 rounds under standard use
Maintenance Made Simple – Compatible with ultrasonic cleaning
Minimal First-Round Pop – Advanced engineering for quiet consistency
Balanced for Control – Eliminates excessive forward weight


Ronin Arms 6.75” Ported SD Barrel

Optimized Gas Regulation for subsonic performance
✔ Compatible with 115gr, 124gr, and 147gr ammo
✔ Professionally installed and head-spaced for accuracy


Complete SD Component Upgrade Includes:

  • SD Cocking Tube & Reinforced Support for smooth operation

  • 120° Locking Piece for softer recoil and reliable function

  • High-Temp Sealing Ring to maintain gas seal and reduce fouling

  • TIG-Welded Barrel Shroud for long-term durability


🛠 How the Conversion Process Works

1️⃣ Disassembly – Removal of factory barrel and components
2️⃣ Install Ronin Arms 6.75” Barrel & Katana Suppressor System – Precision-fitted by experts
3️⃣ Integration of SD Components – Cocking tube, shroud, locking piece, and sealing ring
4️⃣ TIG Welding for Structural Strength – All critical points reinforced
5️⃣ HK Factory Black Finish – Professional, corrosion-resistant coating
6️⃣ Live-Fire Testing & QC – Every build tested before shipping


Technical Specifications (Copy-Friendly)

  • Suppressor: 12” Katana Titanium (Integrally Suppressed)

  • Barrel Length: 6.75” Ronin Arms Ported Barrel

  • Locking Piece: 120° HK Spec

  • Estimated Service Life: 500,000 rounds

  • Maintenance: Ultrasonic cleaner compatible

  • Finish: HK Factory Black, corrosion-resistant coating


📦 Shipping & Transfer Information

Ship ONLY: Barreled receiver & bolt carrier group
Include: Printed order receipt (required)
Suppressor Transfer: Processed via Form 3 to your FFL/SOT
Original Barrel Returned: Included with your converted firearm

🚫 Do NOT send extra parts (stocks, trigger packs, optics) – A $50 handling fee applies, and these items are not guaranteed to be returned


⏳ Build Time & ATF Notes

  • Estimated Build Time: 3–5 months

  • ATF Form 3 Transfer: Required for suppressor (wait times vary)
    ⚠ Status calls will NOT speed up processing


🚫 Refund & Cancellation Policy

  • No refunds after suppressor Form 3 transfer

  • All cancellations incur a 20% restocking fee


✅ Why Choose Ronin Arms?

Specialists in Integrally Suppressed Platforms – MP5, AP5, MPX, and more
Precision Hand-Fitting – No shortcuts, no mass production
Titanium Suppressor Technology for Ultimate Performance
Live-Fire Tested for reliability before shipment


🔥 Key Benefits

Ultra-Quiet Suppression – True SD performance
Perfect Handling – Balanced, authentic feel
Reduced Recoil & Smooth Cycling
Enhanced Resale Value – Adds significant collector appeal
Built to Last – TIG-welded reinforcements and premium components


✅ Order Your AP5-SD Conversion Now

Ronin Arms conversions are limited-production builds to maintain exceptional quality. Don’t miss your chance to own the most advanced full-size AP5-SD integrally suppressed system on the market.

🚀 Experience unmatched suppression.
👉 Click “Add to Cart” now and secure your build today!

📩 Questions? Contact info@roninarmsaz.com
📌 Follow us on Instagram and share your build: #RoninArms #RoninFamily

  1. Ryan S

    Being 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.

Add a review
Welcome to Ronin Arms, in order to browse our site you must be at least 18 years of age.
Are you at least 18 years old?
No
Your Cart

No products in the cart.