SPECIFICATIONS
| Overall Length (COLLAPSED) | 29 in | 736.6 mm |
| Overall Length (EXTENDED) | 32.3 in | 820.42 mm |
| Overall Height | 7.3 in | 185 mm |
| Overall Width | 2.7 in | 67 mm |
| Barrel Length | 11.5 in | 292.1 mm |
| Weight Unloaded | 6 lbs | 2.72 kg |
| Twist Rate | 1:7 | 1:178 mm |
US Palm // AR-15 PISTOL
STORM CAT4 PISTOL
// Advisory Time (UTC/Local)
// Status
Major Hurricane (Category 4)
// Location
29.25N, -81.07W
// Movement
NW at 11mph
// Max Sustained Winds
120mph
Weather Any Storm
DETAILS
The STORM CAT4 Pistol delivers uncompromising performance in a compact, maneuverable platform built for serious shooters. Engineered with premium materials and purpose-driven features, the CAT4 blends durability, precision, and adaptability into a pistol platform that excels in demanding environments.
At its core, the CAT4 features a cold hammer forged 4150 chrome-moly barrel for exceptional longevity and accuracy, paired with a Hiperfire® EDT Designated Marksman Trigger for a crisp, consistent break. The mono-loc handguard system and full-length Picatinny rail provide a rigid, optic-ready foundation for customization, while full ambidextrous controls ensure seamless operation for any shooter. Whether for duty use, range performance, or defensive applications, the STORM CAT4 PISOL is built to perform when it matters most.
HURRICANE Hybrid Flash Hider/Compensator
The US PALM Hurricane Hybrid Muzzle Device on the Storm CAT 4 is one of the rifle’s standout design elements because it’s built to do two jobs at once: flash suppression and recoil control. Instead of being just a standard birdcage flash hider or a straight compensator, it’s a hybrid comp/flash hider with a very aggressive helical, twisted-prong design that follows the barrel’s twist direction. That spiral geometry isn’t just for looks—it helps redirect gases in a way that keeps the rifle flatter during fast follow-up shots while still helping break up muzzle flash.
Full Ambidextrous Controls
The US PALM Storm CAT 4’s full ambidextrous controls are engineered for shooters who demand speed, adaptability, and total command from either side of the rifle. Every critical touchpoint—from the safety selector and magazine release to the bolt catch/release and charging handle—is fully accessible without forcing the shooter to break grip or shift position. This creates a faster, more intuitive shooting experience whether you’re running support-side transitions, working barricades, or performing rapid reloads under pressure.
MONO-LOC HANDGUARD SYSTEM
Built for absolute confidence, the US PALM Mono-Loc handguard system delivers a monolithic-level lockup that pushes rigidity and control beyond the limits of a standard free-float rail. Its precision rear-locking interface keys directly into the upper receiver, creating an ultra-secure foundation that resists flex, maintains accessory alignment, and keeps lasers or optics locked on target under hard use.
With a continuous top rail, full M-LOK modularity, and a rigid seven-sided profile, the Mono-Loc gives shooters maximum space for mission-critical accessories without sacrificing balance or speed. Whether driving through barricades, loading into sling tension, or running high-tempo drills, the system stays rock solid and repeatable.
This is more than a handguard—it’s a stability platform engineered for aggressive movement, zero retention, and total front-end control.
MATERIALS AND CONSTRUCTION
- Upper Receiver: Type III Hardcoat Anodized 7075-T6 Aluminum
- Lower Receiver: Type III Hardcoat Anodized 7075-T6 Aluminum
- Furniture: US Palm 7-Sided M-LOK Rail, US Palm Grip, Magpul DT Carbine Stock
- Barrel: Cold Hammer Forged 4150 Chrome Moly Steel
- Magazine Capacity: 30-rounds
- Sight Configuration: Optic-ready Full Length Picatinny Rail
- Trigger: Hiperfire® EDT Designated Marksman Trigger
SPECIFICATIONS
| Overall Length (COLLAPSED) | 29 in | 736.6 mm |
| Overall Length (EXTENDED) | 32.3 in | 820.42 mm |
| Overall Height | 7.3 in | 185 mm |
| Overall Width | 2.7 in | 67 mm |
| Barrel Length | 11.5 in | 292.1 mm |
| Weight Unloaded | 6 lbs | 2.72 kg |
| Twist Rate | 1:7 | 1:178 mm |
STORM CAT4 PISTOL
In stock
SKU:
HG0001000-1-AA-N
DETAILS
The STORM CAT4 Pistol delivers uncompromising performance in a compact, maneuverable platform built for serious shooters. Engineered with premium materials and purpose-driven features, the CAT4 blends durability, precision, and adaptability into a pistol platform that excels in demanding environments.
At its core, the CAT4 features a cold hammer forged 4150 chrome-moly barrel for exceptional longevity and accuracy, paired with a Hiperfire® EDT Designated Marksman Trigger for a crisp, consistent break. The mono-loc handguard system and full-length Picatinny rail provide a rigid, optic-ready foundation for customization, while full ambidextrous controls ensure seamless operation for any shooter. Whether for duty use, range performance, or defensive applications, the STORM CAT4 PISOL is built to perform when it matters most.
HURRICANE Hybrid Flash Hider/Compensator
The US PALM Hurricane Hybrid Muzzle Device on the Storm CAT 4 is one of the rifle’s standout design elements because it’s built to do two jobs at once: flash suppression and recoil control. Instead of being just a standard birdcage flash hider or a straight compensator, it’s a hybrid comp/flash hider with a very aggressive helical, twisted-prong design that follows the barrel’s twist direction. That spiral geometry isn’t just for looks—it helps redirect gases in a way that keeps the rifle flatter during fast follow-up shots while still helping break up muzzle flash.
Full Ambidextrous Controls
The US PALM Storm CAT 4’s full ambidextrous controls are engineered for shooters who demand speed, adaptability, and total command from either side of the rifle. Every critical touchpoint—from the safety selector and magazine release to the bolt catch/release and charging handle—is fully accessible without forcing the shooter to break grip or shift position. This creates a faster, more intuitive shooting experience whether you’re running support-side transitions, working barricades, or performing rapid reloads under pressure.
MONO-LOC HANDGUARD SYSTEM
Built for absolute confidence, the US PALM Mono-Loc handguard system delivers a monolithic-level lockup that pushes rigidity and control beyond the limits of a standard free-float rail. Its precision rear-locking interface keys directly into the upper receiver, creating an ultra-secure foundation that resists flex, maintains accessory alignment, and keeps lasers or optics locked on target under hard use.
With a continuous top rail, full M-LOK modularity, and a rigid seven-sided profile, the Mono-Loc gives shooters maximum space for mission-critical accessories without sacrificing balance or speed. Whether driving through barricades, loading into sling tension, or running high-tempo drills, the system stays rock solid and repeatable.
This is more than a handguard—it’s a stability platform engineered for aggressive movement, zero retention, and total front-end control.
MATERIALS AND CONSTRUCTION
- Upper Receiver: Type III Hardcoat Anodized 7075-T6 Aluminum
- Lower Receiver: Type III Hardcoat Anodized 7075-T6 Aluminum
- Furniture: US Palm 7-Sided M-LOK Rail, US Palm Grip, Magpul DT Carbine Stock
- Barrel: Cold Hammer Forged 4150 Chrome Moly Steel
- Magazine Capacity: 30-rounds
- Sight Configuration: Optic-ready Full Length Picatinny Rail
- Trigger: Hiperfire® EDT Designated Marksman Trigger
SPECIFICATIONS
| Overall Length (COLLAPSED) | 29 in | 736.6 mm |
| Overall Length (EXTENDED) | 32.3 in | 820.42 mm |
| Overall Height | 7.3 in | 185 mm |
| Overall Width | 2.7 in | 67 mm |
| Barrel Length | 11.5 in | 292.1 mm |
| Weight Unloaded | 6 lbs | 2.72 kg |
| Twist Rate | 1:7 | 1:178 mm |
As low as
$1,399.99
MSRP
California Residents:
WARNING: THIS PRODUCT CAN EXPOSE YOU TO CHEMICALS INCLUDING LEAD, WHICH IS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER AND BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM. FOR MORE INFORMATION GO TO WWW.P65WARNINGS.CA.GOVSpecifications
Click on the dots below to see available options.
THE PERFECT STORM
-
Mono-Loc Handguard System that increases rigidity and produces a true Free-Float design to enhance accuracy and decrease rail deflection. -
Full Ambidextrous Controls including 45-degree Safety, Bolt Catch/Release, Charging Handle, and Magazine Release. -
Flared Magwell -
Hiperfire EDT Designated Marksman Trigger -
US Palm “Hurricane” Hybrid Flash Hider/Compensator -
US Palm Reduced angle grip
Specifications
SPECIFICATIONS
| Overall Length (COLLAPSED) | 29 in | 736.6 mm |
| Overall Length (EXTENDED) | 32.3 in | 820.42 mm |
| Overall Height | 7.3 in | 185 mm |
| Overall Width | 2.7 in | 67 mm |
| Barrel Length | 11.5 in | 292.1 mm |
| Weight Unloaded | 6 lbs | 2.72 kg |
| Twist Rate | 1:7 | 1:178 mm |