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

Forgotten Weapons
Published on November 14, 2025
Category: Reviews
Duration: 17:36

This entry details the m/27PH, Finland's first standard sniper rifle, based on the m/27 Mosin-Nagant. It critically examines the poorly designed Physika prismatic scope, its heavy weight, short eye relief, and the modifications required for its mounting. The historical context of Finnish sniper rifle development and the rifle's limited service due to production delays and inherent flaws are also covered.

Tags

m/27PH
m/37
Finnish Sniper Rifle
Mosin-Nagant
Physika Scope
Prismatic Scope
7.62x54mmR
Winter War
Continuation War
Finnish Military History
Optics
Rifle Modification

Quick Summary

Finland's first standard sniper rifle was the m/27PH (m/37), based on the m/27 Mosin-Nagant. It featured a heavy, 3x Physika prismatic scope with a short 40mm eye relief, necessitating modifications like a bent bolt and cheek rest. Despite its historical significance, the system was considered poorly designed, with production delays limiting its impact and leading to its eventual obsolescence.

Chapters

  1. 00:00Introduction: m/27PH aka m/37 Sniper Rifle
  2. 00:42Historical Context: Early Finnish Sniper Rifles
  3. 03:13Development: The Physika 'Universal' Scope
  4. 05:24Technical Features: Modifications & Mounting
  5. 10:06Accessories & Reticle Design
  6. 14:29Production & Service History

Frequently Asked Questions

What was Finland's first standard sniper rifle?

Finland's first standard issue sniper rifle was the m/27PH, also known as the m/37. It was based on the m/27 Mosin-Nagant rifle and featured a unique, albeit flawed, Physika prismatic scope.

What were the main issues with the m/27PH sniper rifle?

The primary issues with the m/27PH stemmed from its optics. The Physika scope was excessively heavy (800g), had a very short eye relief (40mm), and required significant rifle modifications like a bent bolt and cheek rest, ultimately proving to be a poorly designed system.

When was the m/27PH adopted and how many were produced?

The m/27PH was adopted in late 1937. However, production delays meant only 84 scopes were ready by the Winter War, and the planned 150 rifles were not fully assembled until after the conflict ended in June 1940.

What kind of scope did the m/27PH use?

The m/27PH utilized a Physika prismatic scope. This scope offered 3x magnification with a 24mm objective lens but was criticized for its substantial weight and extremely short eye relief, making it difficult to use effectively.

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