m/27PH aka m/37: Finland's First Standard Sniper Rifle (and it's really bad)

Published on November 14, 2025
Duration: 1:16

The m/27PH, Finland's first standard sniper rifle, featured a unique prismatic scope and modifications like a bent bolt and wooden cheek rest for improved ergonomics. Its scope utilized a novel inertia-based mounting system and a reticle with human silhouettes for range estimation between 300 and 800 meters. Despite its innovative features, the rifle is noted for its significant design flaws.

Quick Summary

The m/27PH (m/37) was Finland's first standard sniper rifle, featuring a unique prismatic scope and a recoil-activated mounting system. It included a wooden cheek rest and a reticle with silhouettes for range estimation between 300-800 meters.

Chapters

  1. 00:00Introduction to the m/27PH
  2. 00:13Bolt Modifications
  3. 00:34Stock and Cheek Rest
  4. 00:45Scope Mount Mechanism
  5. 01:05Reticle Design

Frequently Asked Questions

What was unique about the m/27PH sniper rifle's scope?

The m/27PH featured a unique prismatic scope. It required the shooter to look through a lower eyepiece to see out of a higher objective lens, an unusual design for its time.

How did the m/27PH scope mount work?

The scope mount on the m/27PH lacked a physical locking mechanism. It relied on the force of recoil to drive the scope tighter onto its mounting rail with each shot fired.

What modifications were made to the m/27PH rifle?

Modifications included bending the original Mosin Nagant bolt for better leverage and adding a solid wooden cheek rest to align the shooter's eye with the offset prismatic optic.

What was the purpose of the reticle in the m/27PH's scope?

The scope's reticle contained human silhouettes of various sizes. These were designed as a range-finding tool, enabling snipers to estimate target distances from 300 to 800 meters.

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