Western Airguns Rattler 45 Airgun Rifle

Semi-Auto Big-Bore PCP Air Rifle — 365+ ft-lbs of Muzzle Energy | .45 Caliber | 12-Shot Titanium Magazine

The new standard for high-powered, long-range, big-bore air rifles. In response to the overwhelming success of the Rattler 357, Western Airguns is proud to introduce the Rattler 45—delivering a whopping 365+ ft-lbs of muzzle energy and 12 regulated, target-grade shots per fill from its standard 700cc carbon fiber bottle. Semi-auto, slug-slinging, and sub-MOA accurate—this is big-bore power unleashed.

A full complement of shots from the Rattler totals over 4,300 ft-lbs of combined energy—as fast as you can pull the trigger.

Why Choose the Rattler 45?

• ✅ Massive 365+ ft-lbs Muzzle Energy — Serious big-bore power on tap
• ✅ Semi-Auto Action — Combined energy over 4,300 ft-lbs, as fast as you can pull the trigger
• ✅ Titanium 12-Shot Magazine — Accepts slugs up to 350 grains
• ✅ Sub-MOA Accuracy — Tested 3-shot groups under 1" at 100 yards with good ammo
• ✅ USA-Made Hammer-Forged Barrel — Precision and consistency downrange
• ✅ 700cc Carbon Fiber Bottle — 12 regulated, target-grade shots per fill
• ✅ Easy-Adjust Throttle Valve — Tune velocity to your bullet of choice on the fly
• ✅ Included Moderator — Tames the report from high-powered shots
• ✅ Picatinny Bottom & Side Rails — Ready for bipod and accessory mounting

Description

In response to the overwhelming success of the Rattler 357, Western Airguns proudly introduces the Rattler 45. It offers a whopping 365+ ft-lbs of muzzle energy and 12 regulated target-grade shots per fill from its standard 700cc carbon fiber bottle. The semi-auto action incorporates a titanium twelve-shot magazine that accepts 350-grain slugs. A full complement of shots totals over 4,300 ft-lbs of combined energy—as fast as you can pull the trigger.

Tested three-shot groups with good ammunition deliver 100-yard accuracy of less than an inch from the hammer-forged, USA-made barrel. The versatility is further enhanced with the easy-to-adjust throttle valve, giving the shooter the ability to set the desired velocity for their bullet of choice. A moderator is included to reduce the report from the high-powered shot. The rifle comes standard with a Picatinny bottom and side rail for bipod and accessory use.

The Western Rattler 45 is the new standard for high-powered, long-range, big-bore air rifles.

Specifications

Key Features in Detail

• Big-Bore Power — Up to 365 ft-lbs of muzzle energy puts the Rattler 45 firmly in serious big-bore territory.
• Semi-Auto Firepower — Send a full magazine downrange as fast as you can pull the trigger, for over 4,300 ft-lbs of combined energy.
• Titanium 12-Shot Magazine — Lightweight, durable, and ready to feed slugs up to 350 grains.
• Sub-MOA Accuracy — A USA-made, hammer-forged barrel produces tested 3-shot groups under an inch at 100 yards with quality ammo.
• Adjustable Throttle Valve — Quickly dial in your preferred velocity for whatever bullet you're shooting.
• Included Moderator — Helps tame the report from high-powered shots.
• Bipod & Accessory Ready — Picatinny bottom and side rails let you build out your setup.