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Mayer & Grammelspacher · Rifle

Diana 350 Magnum

Spring piston · .22 Air (5.5mm Pellet)

Also known as RWS 350 Magnum, RWS Diana 350 Magnum, Diana 350 Magnum Classic

About the Diana 350 Magnum

The Diana 350 Magnum is a German break-barrel, spring-piston air rifle built by Mayer & Grammelspacher (Diana) of Rastatt, Germany. A single-shot magnum-class springer offered in .22 (5.5mm) and .177 (4.5mm), it is one of the most powerful conventional spring-piston rifles ever mass-produced, driving .22 pellets to roughly 20-22 ft-lbf of muzzle energy. Cocked by breaking the rifled barrel, it uses the adjustable Diana T06 two-stage trigger, a Monte Carlo beechwood stock usable by left- or right-handed shooters, fiber-optic open sights and an 11mm dovetail rail for scope mounting. Its high power comes at the cost of a heavy, roughly 45-pound cocking effort and noticeable recoil, making it a favorite for hunting and long-range plinking.

Diana, founded in 1890 in Rastatt, Germany, is one of the oldest airgun makers in the world. The 350 Magnum became the company's flagship high-power break-barrel, prized among airgun hunters for wringing near the practical ceiling of spring-piston output while retaining the refined T06 trigger and traditional beechwood stock that define the Diana line.

Diana 350 Magnum specifications

General

Type
Rifle
Action
Spring piston
Firing mechanism
Fixed firing pin
Trigger
Two stage
Trigger pull
1.5 kg (3.4 lb)
Calibres
.22 Air (5.5mm Pellet), .177 Air (4.5mm)
Magazine capacity
1 rounds

Dimensions

Barrel length
489 mm (19.3 in)
Overall length
1219 mm (48.0 in)
Weight (empty)
3.80 kg (8.38 lb)

Barrel

Rifling
Right hand

Materials

Barrel
Steel
Receiver / frame
Steel
Stock
Wood
Finish
blued

Performance

Muzzle velocity (typical)
265 m/s (869 fps)
Muzzle energy (typical)
28 J (21 ft·lb)
Effective range
50 m

History

Production status
In production
Country of origin
DE

Available calibres

.22 Air (5.5mm Pellet).177 Air (4.5mm)

Features

  • Break barrel cocking
  • Single shot
  • T06 two stage adjustable trigger
  • Monte carlo beech stock
  • Ambidextrous stock
  • Fiber optic open sights
  • Globe front sight
  • 11mm dovetail scope rail
  • Ventilated rubber buttpad

Safety

  • Automatic safety
  • Anti beartrap

Marketed in North America under the RWS brand as the RWS Model 350 Magnum. Manufacturer-quoted velocities reach about 1000 fps in .22 and up to 1250 fps in .177 using light alloy pellets; real-world lead-pellet figures are lower. Sold in Classic (beech) and Premium stock trims, and later joined by gas-ram N-TEC variants.

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