TNW Finnish Suomi KP/-31 9x19mm Semi-Auto Rifle w/ Drum and Box Mags
SOLD FOR: $1,494
WOA#: WY240117CB011
Make: TNW, Tikkakoski
Model: KP/-31 / M31
Serial Number: H5927
Year of Manufacture: 1931-1953, Modern semi-auto conversion
Caliber: 9mm Luger (9x19mm)
Action Type: Semi-automatic, blowback
Markings: The left side of the receiver is marked “H5927”. The rear cap is marked “48704”. The barrel is marked “50624” and “69658” crossed out. The right rear corner of the barrel shroud is marked “37818”. The left side of the rear sight is marked “SUOMI Tikkakoski” and with two Tikka triangle “T” marks. The right side is marked “PATENT 1932”. The rear top of the base is marked with a squared “SA” mark. The bottom left side of the receiver leg is marked “M31 SA 9X19 TNW INC. VERNONIA, OR”. The safety is marked with a green arrow point backward and an orange arrow point forward on both sides. The front of the drum magazine is marked “*44613” and with a boxed “SA” mark. The rear is marked “*98377”. The shorter magazine is marked with a shield “L”, a boxed “SA”, and “57 39” on its rear. Both of the long magazines are marked with a shield “L”, a boxed “SA”, and “14 24 36” on their rears. One of the long magazines is also marked “57 28” and the other is marked “57 35”. There are a few small proof and acceptance marks scattered throughout.
Barrel Length: 16.5”, the last 4.25” is an unrifled extension that was added for importation.
Sights / Optics: The front sight is a blade dovetailed into a base near the end of the barrel shroud. The rear sight is an adjustable sliding u-notch leaf sight marked “1-5”.
Stock Configuration & Condition: The wood stock has a semi-pistol grip, through bolt, left side sling loop, and a metal buttplate. The buttplate is scratched and worn along the edges. There are compression marks, scuffs, and scratches throughout the wood. There is wear to the buttstock along the rear edge. There are a few small cracks at the bottom of the grip. The LOP measures 13.5” from the front of the trigger to the back of the buttplate. The stock rates in about Good overall condition.
Magazine Quantity & Condition: 4x total magazines: 1x 71 round drum magazine, 2x 36 round box magazines, and 1x 30 round box magazine. All of the magazines are in Good condition.
Type of Finish: Parkerized
Finish Originality: Original to conversion
Bore Condition: The bore is bright and the rifling is sharp. There is light erosion in the bore.
In this writer’s opinion, this bore rates 9 out of 10.
Many military and C&R eligible weapons have bores that will show erosion. This is not only due to age but to the fact that corrosive primers were commonly used in ammunition worldwide. For example, the U.S. used corrosive ammunition throughout WWII. The U.S. military did not begin to phase out corrosive-primed ammunition until the 1950s.
Overall Condition: This rifle retains about 90% of its metal refinish. There are scuffs and scratches throughout the metal surfaces. There is a long drag line on the left rear side of the receiver. There is wear to the finish on the receiver end cap. There is pitting under the newer finish on the barrel shroud. The shroud retention lever has worn a line into the finish. There is wear to the finish along the sides of the rear sight escalator. The magazines have areas of wear to their blued finish throughout. The screw heads show light to moderate use. The markings are clear. Overall, this rifle rates in about Very Good condition as refinished.
Mechanics: The action functions correctly. We did not fire this rifle. As with all used firearms, a thorough cleaning may be necessary to meet your maintenance requirements.
Box, Paperwork & Accessories: This rifle comes with a leather sling, a 71 round drum magazine, two 36 round stick magazines, and a 30 round stick magazine.
Our Assessment: The Suomi KP/-31 was the primary submachine gun of the Finnish military during their wars against the Soviet Union in the late 1930s and early 1940s. Chambered in 9x19mm, the KP/-31 was unique among contemporary submachine guns in that the barrel was secured by lugs rather than being threaded into the receiver. This allowed soldiers to quickly change out an overheated barrel during combat. The KP/-31 was immensely successful and caused countries like the Soviet Union to reconsider its hesitancy towards using submachine guns on a wide scale. Many KP/-31s were imported into the United States as parts kits and TNW in Oregon was one of the primary companies that took the parts kits and created semi-automatic conversions for them. This is an example of one of those TNW made KP/-31 conversions. The stock has a bit of wear to it, mainly around the buttplate, though there are a few very small cracks at the bottom of the grip. The metal retains nearly all of its parkerized finish, with some scuffs and scratches scattered throughout. The bore is in really nice shape, with sharp rifling that should make for a good shooter. This rifle comes with a leather sling, a 71 round drum magazine, two 36 round box magazines, and a 30 round box magazine. All of the magazines are Finnish Army marked. This would fit into any Finnish, Second World War, or semi-auto conversion collection. Please see our photos.
-99
