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UPC 793676109237
Manufacturer Gamo USA
Manufacturer Part # 6110039063554
Model G3i
Model Swarm Magnum 8X
Type Air Rifle
Caliber 25 Caliber
Feet per Second 965
Barrel Length 21.3″
Color Black
Accessories With 3-9×40 Scope
Capacity 10 Rounds
Subcategory Air Rifles
Stock Synthetic
Swarm Magnum PRO 8X GEN3i INERTIA FED .25 caliber 8-shot pellet rifle
When the job calls for maximum impact, the Swarm Magnum Pro 8X GEN3i (.25) brings the power—and the speed to stay on target.
GAMO’s horizontal 8-shot GEN3i system keeps the rifle sleek while delivering quick, smooth follow-up shots.
Add the punch of IGT Mach 1 (33mm), Whisper Fusion noise suppression, and a tunable C.A.T. trigger, and you’ve got a magnum-class break-barrel that’s ready to hunt right out of the box with an included 3–9×40 scope.
Description
The Swarm Magnum Pro 8X GEN3i (.25) is built for shooters who want one thing above all: serious hunting-level impact with fast follow-up shots.
It’s a .25 caliber break-barrel that hits with authority, but it doesn’t force you to slow down and reload after every shot.
The whole platform is centered around GAMO’s latest 8X GEN3i horizontal, inertia-fed magazine, keeping the rifle more compact and low-profile while still giving you eight shots on tap.
What makes this rifle feel “next gen” is how the magazine works. Instead of a bulky top-mounted design, the GEN3i magazine sits horizontal and indexes using recoil inertia, which helps each pellet line up smoothly for a more consistent breech-loading cycle.
It’s fast, it’s clean, and it keeps the rifle feeling balanced in the hands—especially for a magnum-class break-barrel.
Power-wise, this one is unapologetically built for the field.
The Swarm Magnum Pro runs GAMO’s IGT Mach 1 gas piston with a 33mm cylinder, pushing alloy pellets up to 965 fps in .25 caliber—exactly the kind of setup you want for larger pests and hard-hitting small game work.
And since magnum performance can be loud, GAMO pairs it with Whisper Fusion sound suppression, plus a two-stage independently adjustable C.A.T. trigger to help you break shots cleanly.
It also comes with a GAMO 3–9×40 scope and a one-piece mount, so you’re not piecing the kit together after checkout.
Includes an 8-shot magazine.
8X GEN3i INERTIA-FED RAPID RELOAD
Eight shots, low profile, smoother cycling. The horizontal GEN3i magazine indexes using the rifle’s recoil energy, helping pellet alignment and breech loading feel more consistent shot after shot.
MAGNUM POWER IN .25 CALIBER
Built for knockdown power, this .25 platform is rated up to 965 fps with alloy pellets, delivering strong downrange energy for hunting and pest control.
IGT MACH 1 GAS PISTON + 33MM CYLINDER
GAMO’s IGT Mach 1 system replaces the traditional spring with a gas piston, and the 33mm cylinder is designed for higher output and a more controlled shot cycle in a high-power break-barrel.
WHISPER FUSION NOISE SUPPRESSION
Whisper Fusion is GAMO’s top-tier suppression system, designed to reduce muzzle report by managing air expansion through multiple stages.
C.A.T. INDEPENDENTLY ADJUSTABLE TRIGGER
The two-stage C.A.T. trigger is independently adjustable, letting you fine-tune the pull to match your preference for better control and more consistent accuracy.
FIELD-READY STOCK + INCLUDED SCOPE
A redesigned, classic hunting-style stock made from automotive-grade glass-filled nylon with non-slip texturing at the forearm, grip, and cheekpiece—plus an included 3–9×40 scope and one-piece mount to get you set up fast.
Specifications
Dimensions: 51 × 2.688 × 7.25 in
Caliber: .25
Velocity: 965 feet per second (fps) with Alloy Pellets
Action: 8X GEN3i 8-Shot, Auto-Loading Technology
Noise dampening: Whisper Fusion
Powerplant: IGT Mach 1 Inert Gas Technology gas piston (33 mm cylinder)
Barrel: Metal jacketed rifled steel barrel
Trigger: Two stage independently adjustable CAT (Custom Action Trigger)
Stock: Automotive grade glass filled nylon all-weather
Checkering: Non-Slip texture design on grip and forearm
Recoil Pad: Ventilated rubber
Safety: Manual safety and automatic cocking safety system*
Optics: GAMO 3-9×40 air rifle scope with rings (shockproof, fogproof)
Rail: 11 mm aluminum rail, RRR (Recoil Reducing Rail)
Warranty: 5 Year
Weight: 6.88 lbs
Length: 49.2 in
Length of Pull: 15 in
Ammunition: .25 Cal. – Any .25 Cal. Pellet
Trigger Pull: 3.2/2.6 lbs
Barrel Length: 21.3 in
Cocking Effort: 41 lbs
Energy: 26.55 ft/lbs – 36 J
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