2.75" / 70mm M151 High Explosive Hydra Rocket with Mark 66 Mod 2 Rocket Motor
$1,295.00
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2.75" / 70mm M151 High Explosive Hydra Rocket
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Bring authentic close air support history into your collection with this restored 2.75" / 70mm M151-style Hydra rocket, built around a genuine inert Mk 66 Mod 2 rocket motor mated to an original 2.75" WTU-1/B practice warhead that has been professionally finished to visually replicate the iconic M151 High Explosive warhead (commonly known as the 10-pound HE warhead). The result is a full-size display piece.
A Classic of Modern Close Air Support
The 2.75" Folding-Fin Aerial Rocket family began in the late 1940s and evolved into what is now known as the Hydra 70 system, a 70mm unguided rocket widely used by U.S. and allied forces from the Vietnam era to the present day.
The M151 High Explosive warhead is the classic general-purpose "10-pounder," designed for anti-personnel and light material targets. It contains a steel body filled with approximately 2.3 lb of Composition B-4 high explosive and, on detonation, shatters into thousands of high-velocity fragments with a burst radius of about 10 m and an effective casualty radius exceeding 50m. This warhead, fired from aircraft such as the AH-1 Cobra, AH-64 Apache, UH-1 Huey, and other rotary- and fixed-wing platforms, became a staple of battlefield fire support.
The Mk 66 rocket motor—in this case the Mk 66 Mod 2—is the modern WAFAR (wrap-around fin) motor developed to replace earlier Mk 4/Mk 40 motors. It uses a more powerful, smokeless propellant and wrap-around fins that deploy after launch, providing improved performance while remaining compatible with a wide family of 70mm warheads, including the M151.
About the WTU-1/B Practice Warhead
Your display rocket uses a real 2.75" WTU-1/B practice warhead, originally designed as an inert slug for training and system testing. The WTU-1/B is manufactured to have the same external shape, weight, and center of gravity as the live M151 HE warhead. Still, it is solid, inert, and produced without a fuze cavity or explosive filler. This ensures authentic geometry and handling characteristics while remaining completely non-functional.
On this piece, the WTU-1/B has been professionally refinished to visually represent an M151 High Explosive warhead, giving you the correct silhouette and presence of a live HE round without any energetic components.
About This Specific Item
- Genuine Inert Mk 66 Mod 2 Rocket Motor
- Real inert rocket motor from the Hydra 70 family
- Wrap-around fin design typical of modern 70mm rockets
- Real 2.75" WTU-1/B Practice Warhead – Finished as M151 HE
- Solid, inert practice warhead with no fuze well and no explosive filler
- Externally painted and marked to closely resemble an M151 High Explosive warhead
- Accurate Full-Size Display
- Overall length just under 5 feet, matching typical Hydra 70 proportions (Mk 66 motor length plus 16.2" warhead)
- Correct 2.75" / 70mm diameter for an authentic visual profile
- Completely Inert & Safe for Display
- No explosive filler
- No live fuze or propellant
- Non-functional, display-only item
Ideal For
- Military aircraft restorations (Cobra, Apache, Huey, Kiowa, and similar gunship displays)
- Museum and educational exhibits on modern CAS and rotary-wing fire support
- Advanced inert ordnance collections focusing on Cold War and post-Vietnam era aviation weapons
- Office, shop, and man-cave displays where a full-size rocket makes a strong visual statement
Own a true piece of Hydra 70 history—built from real components, carefully restored, and finished for serious collectors who demand authenticity without compromising safety.
Approx length 53", Approx width 2.75", Approx height 2.75", Approx weight 2lbs.
Pictures are stock images of our inventory. Unless otherwise noted, you will not be receiving the exact item shown in the pictures. The pictures are representative of the item's general condition. The item you receive might be slightly better, or worse, condition than was shown in the pictures.
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