US Palm Storm CAT4 Features The US Palm Storm CAT4 is built around a cold hammer forged 4150 chrome moly steel barrel at 16 with a 1:7 twist chambered in 5.56 NATO for reliable performance across a wide range of ammunition. Every critical wear point has been reinforced with hardened user-serviceable components for long-term durability under hard use. An innovative upper-to-handguard interface enhances rigidity maximizing mechanical accuracy and ensuring repeatability for mounted optics and aiming systems. A hybrid flash hider reduces both flash signature and felt recoil keeping the shooter on target through rapid strings of fire. Fully ambidextrous controls provide seamless operation from either side of the rifle a feature built into both the Type III hardcoat anodized upper and Storm Green lower receivers. The US Palm 7-sided M-LOK rail in-house designed US Palm reduced angle grip and Magpul DT carbine stock give the shooter a complete ergonomic furniture package engineered for control and comfort. The Hiperfire EDT Designated Marksman Trigger delivers a crisp pull suited to precise shot placement at distance. With a full-length Picatinny rail for optics mounting and a 30-round magazine capacity the Storm CAT4 is a complete duty-ready rifle for sale at GrabAGun. US Palm Storm CAT4 Specifications Manufacturer: US Palm Model: Storm CAT4 Caliber: 5.56 NATO Capacity: 30+1 Barrel Length: 16 Barrel Description: Threaded Barrel Material: Chrome Moly Vanadium Barrel Type: Cold Hammer Forged Twist Rate: 1:7 Muzzle Device: US Palm Hurricane Flash Hider Thread Pattern: 1/2x28 Action: Semi-Auto Handedness: Ambidextrous Receiver Finish: Storm Green Anodized Receiver Description: Picatinny Rail Handguard: M-LOK Grips: US Palm Reduced Angle Stock Description: Magpul DT Carbine Stock Finish: Black Trigger: Hiperfire EDT Overall Length: 33.50-36.80 Weight: 7 lbs Available At: GrabAGun