$349.90
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.
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.
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.
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.
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 is GAMO’s top-tier suppression system, designed to reduce muzzle report by managing air expansion through multiple stages.
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.
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.
| Weight | 9.3368 lbs |
|---|---|
| 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 |
*Manual Safety: The manual safety is the lever that is in front of the trigger, if you pull it forward, the safety is off, if you pull it backwards (towards the trigger), the safety is on. Please make sure you do not turn the safety off until you are ready to shoot.
Automatic Cocking Safety System: The automatic safety cocking system is a different safety feature than the Manual Safety; it does not allow you to pull the trigger while cocking the air rifle. When you break the barrel this safety system is engaged and when you put the barrel back into position this safety system is disengaged.
Please read the manual before using.
THIS DEVICE IS A REPLICA FIREARM UNDER DIFFERENT STATE LAWS. DO NOT BRANDISH, DISPLAY, EXHIBIT OR EMPLOY THIS AIRGUN: (I) IN PUBLIC, SINCE IT MAY CONFUSE PEOPLE; OR (II) IN A THREATENING MANNER, BY CAUSING OR ATTEMPTING TO CAUSE TERROR TO ANOTHER PERSON, OR BY ACTING WITH RECKLESS DISREGARD FOR THE RISK OF CAUSING TERROR TO ANOTHER PERSON. IT MAY BE A CRIME PUNISHABLE BY FINES AND IMPRISONMENT. POLICE AND OTHERS MAY THINK THIS ARIGUN IS A FIREARM. DO NOT CHANGE THE COLORATION AND MARKINGS REQUIRED BY STATE OR DEFERAL LAW OR REGULATIONS TO MAKE IT LOOK LIKE A FIREARM. THAT IS DANGEROUS AND MAY BE A CRIME.
THIS IS NOT A TOY. ADULT SUPERVISION REQUIRED. MISUSE OR CARELESS USE MAY CAUSE SERIOUS INJURY OR DEATH. MAY BE DANGEROUS UP TO 250 YARDS / 229 METERS. THIS AIRGUN IS RECOMMENDED FOR USE BY THOSE 16 YEARS OF AGE OR OLDER. READ ALL INSTRUCTIONS BEFORE USING. THE PURCHASER AND USER SHOULD CONFORM TO ALL LAWS GOVERNING THE USE AND OWNERSHIP OF THIS AIRGUN.
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.gov
