Radiata Inc. Victrix Full Size Lower Kit
$499.87
Precision engineered in Texas from advanced composite materials built to perform under real-world conditions. The Victrix Lower is one of our personal picks because it’s the same setup we run daily. Designed as a true drop-in fit for full-size MP5-pattern systems, it delivers the strength, consistency, and performance we expect from our own gear.
All brand names are mentioned only for fitment and compatibility. Radiata Inc. and 54-Seventeen Tactical are not affiliated with or endorsed by those manufacturers.
The Radiata Inc. VICTRIX Lower represents the next evolution in MP5-pattern platforms—engineered by Radiata Inc. and distributed exclusively through 54-Seventeen Tactical.
Designed for shooters who demand precision, reliability, and modern engineering, the VICTRIX delivers superior trigger response, refined ergonomics, and long-term durability under all conditions.
Each unit is manufactured in Texas using advanced composite materials that are heat, moisture, and chemical-resistant. Reinforced stainless-steel internals ensure durability under sustained use, while the 3.5-lb flat-faced trigger provides a crisp and predictable pull.
Compatible with most full-size Turkish MP5-pattern platforms, including SP5 | SP5L | AP5 | AP5-P | AP5-L | AP5-SD | MAC-5 | ZF-5 | 9CT | 9C | 9R | 9RS, the VICTRIX is a true drop-in fit — no gunsmithing required.
Key Features
- Exclusive Radiata Inc. / VICTRIX Edition – precision-engineered and distributed exclusively through 54-Seventeen Tactical, setting a new standard for modern MP5-pattern lowers.
- Fully Assembled & Ready to Install – ships complete with a 3.5 lb flat-faced trigger, factory-installed CNC-machined S7S Super Safety, and ejector assembly, ready for immediate drop-in installation.
- Advanced Composite Construction – built from high-grade composite material engineered for rigidity, heat stability, and chemical resistance without added weight.
- Reinforced Stainless-Steel Internals – precision-fitted components ensure consistent performance and durability under sustained use and high round counts.
- Rotary-Safety Ready – able to accept ambidextrous 3-position rotary safeties, compatible with Leber FCU and other modern selector systems.
Note: Please consult the safety manufacturer before installation. Modifying the VICTRIX may void the warranty. - True Drop-In Installation – installs directly with no gunsmithing or fitment required, delivering a precise interface to your existing platform.
- Quality-Controlled & Texas-Built – proudly designed, assembled, and inspected in the USA under strict dimensional and performance standards.
- Warranty – backed by a 1-year limited warranty against manufacturing defects.
Model Compatibility
Designed to fit common Turkish MP5-pattern platforms, including (but not limited to):
- AP5 family — AP5, AP5-P (full-length and pistol variants), AP5-SD (and related sub-variants)
- MAC-5 series — Turkish MP5-style clones commonly imported under MAC-5 names
- Z-style clones — including ZF-5 and similar Z-branded full-size MP5-style models
Manufactured to match common Turkish/OEM full-size MP5 dimensions for a precision lock-up and true drop-in fit. Because variants and rebrands exist, please verify your host model type before ordering.
Direct Fit — Full-Size Model
If you own a full-size MP5 platform, this listing is the correct fit for your host.
Examples of full-size hosts include AP5, ZF-5, and MAC-5.
If you own a compact or K-style host, purchase the dedicated MP5-K (K-model) listing for proper fitment.
Fitment Reminder
Variants and rebrands exist — if you are unsure about fitment, contact us with photos of your model or consult our fitment guide before purchasing.
Firearm shown for demonstration only; housing sold is an aftermarket part and does not include a serialized receiver or complete firearm.
State Restrictions
Due to state and local regulations, this product cannot be shipped to the following states:
California (CA), Colorado (CO), Connecticut (CT), Delaware (DE), Florida (FL), Hawaii (HI), Illinois (IL), Massachusetts (MA), Maryland (MD), Minnesota (MN), New Jersey (NJ), New York (NY), or Rhode Island (RI).
Orders placed from these states will be canceled and refunded. By ordering, you confirm your ship-to address is within the United States and that receipt of this item is lawful at that address.
Trademark & Brand Disclaimer
All product names, trademarks, and brand references — including AP5, ZF-5, MAC-5, POF-5, and MP5 — are the property of their respective owners and are used solely for compatibility and reference purposes.
Radiata Inc. and 54-Seventeen Tactical are not affiliated with, endorsed by, or sponsored by those manufacturers.
This product is an aftermarket lower housing engineered for compatibility with MP5-pattern platforms.
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SP5 ,SP5L ,AP5 ,AP5-P ,AP5-L ,AP5-SD ,MAC-5 ,ZF-5 ,9CT ,9C ,9R ,9RS ,Don’t see my model? |
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William Santos –
I was scrolling Facebook when I bumped into this Victrix MP5 lower. Shot a couple questions over instant reply. So I was like screw it I’m ordering. Dude, this thing showed up in like five days flat, fits my SP5 like it’s meant to be, and runs so damn smooth.
Fast delivery
Lansing –
Purchased for my zenith ZF-5. Fitment was a little tight right out of the box but was to be expected with these guns. Runs smooth, great trigger improvement over the factory stamped sheet metal one. Overall, very happy with my purchase.
Isaac –
bought for my MAC5k and it has been running like a sewing machine since i bought it. the trigger is amazing at around 3.5lbs. i have put a couple thousand rounds down range with this lower and it’s still running like a champ, no warping or wear on the parts other than normal.