#469 • Suomi KP/-31 submachine gun DRUM MAGAZINE

Part of Circle K Sporting Goods Fall 2026 Inventory Reduction (timed auction by MNauction)

Starting at $2.50

Status: Available

Bidding closes Oct 27, 2026 6:57 PM CDT

Based on the specific stamps you described, your item is a Finnish military firearm magazine, manufactured by Oy Tikkakoski Ab (commonly known as Tikka) and property-stamped for the Finnish Army. Given that it is a rotary drum magazine, this is specifically an original 50-round or 70-round drum magazine intended for the Suomi KP/-31 submachine gun (or a similar Finnish military firearm).  Here is exactly what your individual markings mean: 1. The "T in an Upside-Down Triangle Inside a Circle" The Manufacturer: This is the iconic logo of Tikkakoski (Tikka), a major Finnish firearms and defense manufacturer. The Orientation: The T inside a downward-pointing (inverted) triangle enclosed by a circle is the official factory proof stamp used by the arsenal to certify that the part passed inspection. [1, 2] 2. The "SA in a Square" The Property Mark: "SA" stands for Suomen Armeija (Finnish Army). The Meaning: Enclosed in a square, this property mark was stamped on almost all firearms, magazines, and gear accepted into official service by the Finnish military beginning in the early 1940s.  3. The Numbers (40723 and 40731) Serial Numbers / Batch Codes: These are the unique serial numbers or assembly/batch numbers stamped during production. Because drum magazines have multiple moving parts (the main drum body and the internal rotatable feed mechanism on the "other side"), it was common for matching or closely numbered factory components to be paired together during assembly or subsequent military refurbishment.