Ronin Arms

Ronin Arms operates on one principle: One Gun. One Gunsmith. Every build is hand-crafted from scratch by a single master gunsmith, with no mass production shortcuts and no compromises on quality.

Ronin Arms specializes in integrally suppressed MP5SD platforms. Their flagship offering is the RA5-SD Full Build—a precision-engineered, suppressor-equipped rifle that combines authentic MP5 heritage with modern suppression technology.

Key Features of the RA5-SD:

• •Titanium SD Suppressor – Aerospace-grade titanium construction, rated for 400,000–500,000 rounds
• •Cold Hammer Forged 6.75" Barrel – Ported for subsonic 115gr and 124gr ammunition
• •LSC Receiver Flat – Precision-rolled and TIG-welded for maximum strength
• •Tungsten-Filled RCM Bolt Group – Flawless cycling under all conditions
• •HK SP5-Style Ambidextrous Trigger – Crisp, consistent pull for precision shooting
• •Integrated 1913 Rail – Rock-solid optics platform

Every RA5-SD takes 6–9 months to complete. When you order, you're placed into an active build queue. Work begins immediately with hand-fitting, TIG welding, and live-fire testing. This isn't assembly-line work—it's custom gunsmithing.

"In Stock" means parts are on hand and you're in the build queue. It does NOT mean ready to ship.

Ronin Arms conversions work with full-size MP5 receivers and clones: - HK MP5 / SP5 - AP5 (Full Size) - Zenith ZF-5 Series - MKE Z-5RS, Z-43 - PTR 9R, 9CT, 9C/Classic, 9FR - POF Full-Size MP5 - Dakota Tactical D54 Series

Not compatible: K-models, PDW variants, or micro receivers.

• •SD Conversions – Convert existing full-size MP5 receivers to suppressed configuration
• •Laser Engraving – Custom markings on builds
• •Cerakote Finishing – Premium color customization options
• •Handguard Selection – Configure your build to your specifications

• •By Appointment Only – Located in Rochester, TX
• •FFL & NFA Compliance – Suppressors require SOT-licensed FFL transfer and ATF Form 4 processing
• •All Sales Final – Custom, hand-built items are non-refundable once ordered
• •Suppressor Maintenance – Rated for extreme round counts; ultrasonic cleaner compatible for external cleaning only

Contact: - Tech Support: 928-951-3031 - Orders: 928-951-3171 - 2246 County Rd. 185, Rochester, TX 79544