Original MOD 6M target .177

Collection from CM23 3YT - Excellent condition see images for detail

The "Original 6M Mod Pistol" is the Diana (Original-branded) Model 6M, a high-quality German .177 calibre (4.5mm) spring-powered recoilless target air pistol from the late 1970s

Background and History

Diana (Mayer & Grammelspacher) is a historic German airgun maker founded in 1890 in Rastatt. The company pioneered many innovations and sold guns worldwide under names like Original (common in the UK and some export markets), Beeman, Hy-Score, RWS, Geco, and others.

The original Model 6 (1960) introduced the revolutionary GISS recoilless system (patented around 1955 by Helmut/Kurt Giss). This made it one of the first truly recoil- and vibration-free spring-piston match pistols, transforming competitive air pistol shooting. The 6M variant (roughly 1979–1999) added refinements like improved sights, a rotating barrel sleeve/shroud, and options for better target grips.

These pistols were premium target guns in their era—accurate, well-engineered, and ahead of their time. They remain favourites among vintage airgun collectors and shooters today.

Key Features and the GISS System

Recoilless GISS mechanism: Two pistons work in opposition. The main piston compresses and releases air to drive the pellet forward; a counter (or “dummy”) piston moves in the opposite direction to cancel recoil and spring vibration. The result is an exceptionally smooth, dead-recoil shot—highly valued for precision target work.

Calibre: .177 (4.5mm).

Power: Spring-piston; typical velocities around 400–450 fps (varies with condition, tuning, and pellet).

Sights: Excellent adjustable target sights. The 6M often includes a premium target front post and a rear sight with multiple interchangeable apertures.

Cocking: Features a rotating barrel sleeve or sliding shroud that protects the shooter’s hand from the front sight during cocking. It can feel stiff or require deliberate effort compared to simpler break-barrels.

Grips: Many 6M examples (especially later ones) have wooden anatomical/target grips with an adjustable palm shelf or rest—matching the wood grip you mentioned. Earlier variants often used plastic (sometimes grey or “slant” style).

Build and size: Robust German construction, hefty feel (roughly 3 lbs / ~1.3–1.5 kg), and overall length around 16 inches (40+ cm). It has a solid, precision-tool-like presence.

Trigger: Generally praised as crisp and suitable for target shooting.

It is not a firearm or CO₂ pistol—it is a classic spring-powered air pistol designed for serious target/plinking use.