TNW Suomi Range Report

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I got a chance today to shoot my new TNW Suomi semiauto 9mm carbine.

Suomi-SA.jpg

Friends and I put 150 rounds through it (100 Federal 115 grain FMJ and 50 Brown Bear 115 grain FMJ). The only issue we had with the gun was after the first shot, the trigger failed to reset. This may have been related to some tinkering I did in an effort to improve the heavy trigger pull. Other than, there were a couple times we failed to properly seat the mag and it fell out, but this was purely operator error.

I have a drum but it needs to be fitted to the gun, so we just used 36 round stick mags.

Other than those glitches the gun ran perfectly. Recoil is about like a .22 and the report isn't much louder. It's a heavy beast at about 12 pounds, and the trigger needs some work to make it lighter, but it is a ton of fun to shoot. At $485 + shipping and your FFL's transfer fee, it's a good deal IMO for a range toy with a lot of historical appeal.
 
I got one myself and love it. Super reliable with the stick mags but the drum is a jam-o-matic.

Sent from my KFTT using Tapatalk 2
 
Something is wrong. The Suomi drum design was one of the most successful and reliable in history. The Russians copied it. Both the 1932 centerfeed drum and 1940 centerfeed qual-column coffin mags were considered improvements on the reliability of the dual-feed double column stick mag.

Something is wrong with your drum or gun.

Mike
 
These Suomis were demill cut through the magwell; obviously the repair TNW does is a tiny bit shorter than original (probably due to weld shrinkage). So long as the mis-fit is only .01" or so, I wouldn't worry. If it's 1/4", you got you a PPSH mag by mistake :neener:. Unlike the PPSH, the Suomis were made to tight tolerances and the drums/sticks required no fitting. JBrady555, your drum has either 1) a dent in the side causing binding, 2) damaged feed lips (unlikely), or 3) damaged spring, or 4) rust/binding internally. The Suomi/PPSH design is the most reliable drum design that's ever been done, due in large measure to the straight-out feed arrangement the gun uses, so there is very little to go wrong unless the drum cannot unwind smoothly and feed rounds fast enough.

Glad you enjoy the gun. I have a kit I really need to build out into a striker fired semi auto one of these days, and they really are one of the nicer SMGs ever made (especially considering the price). I've fired 16" 9mm carbines before; they really do suppress themselves quite well.

TCB
 
Dave Markowitz

Looks pretty cool, even with the longer barrel. Years ago I had a Sterling Mk.VI semi-auto carbine and it was (forgive the pun), a blast to shoot. Went through a lot of 100 count WWB to keep that gun running but it was worth it.
 
We only shot offhand from about 10 yards. I hope to get it to a formal range in the near future and try it from a bench, and test for accuracy.
 
"Did I read correctly, a 12lb 9mm?"
"We only shot offhand from about 10 yards. I hope to get it to a formal range in the near future and try it from a bench, and test for accuracy."

The originals had pie-plate accuracy at 25 meters on full auto. You have to understand that when the gun was developed, SMGs were new and a major source of pride for ambitious militaries. They were seen as second only to full-on machine guns as far as technological sophistication.

The M31 receiver (the tube and lower section) were machined from a single solid forging that had to have weighed 40lbs at first, and ultimately hardened to some ungodly high figure --the bolt even more so. The trigger group was a select fire design allowing for very accurate and deadly aimed fire at distance which allowed individual Finns (with mag loaders helping keep them stocked) annihilate entire Russian charges with a single SMG. The bolt handle was non-reciprocating.

Forgetting the modern connotations of SMGs as cheap M3 Grease Guns and STENS, these old 1st/2nd gen SMGs were some of the nicest weapons made leading up to WWII (then they got cheap real quick :D). The effectiveness of the M31 against the Russians was reportedly a factor in Germany's decision to take them on, believing they would be similarly dominant with their technological finery. But Russia had learned their lesson well, and their M31 variant, the PPSH41, was widely distributed through their front lines along with snipers (along with the occasional machine gun and crap-ton of bolt-rifle infantrymen) which directly blunted the Germans' tactics.

TCB
 
The originals had pie-plate accuracy at 25 meters on full auto. You have to understand that when the gun was developed, SMGs were new and a major source of pride for ambitious militaries. They were seen as second only to full-on machine guns as far as technological sophistication.

Correct. The Finns initially issued them to be used similarly to what we'd call a SAW. IIRC, each gun also had a spare barrel issued along with it. It is easy to change quickly with no tools. The primary Finnish small arm during the Winter War was the Mosin-Nagant rifle (in numerous variants), but the Finns' expert use of the Suomi made a huge impression on the Red Army. The PPSh-41 drum is nearly a direct copy of the Suomi drum.
 
The Suomi was designed and built to work each and every time without fail. It was normal during the Winter War to employ a two man team for the Suomi, a loader and a shooter. The loader kept (or attempted to) clips and drums loaded. The Suomi was often used as short range artillery for plunging fire on a beaten zone and enfilading fire, as noted earlier there were instances of two man teams wiping out Russian platoons, or more.
 
I will be getting my long lusted after Soumi as soon as I resolve some medical problems. I have fired a few and love the feel.
 
Did I read correctly, a 12lb 9mm?
And the trigger is even more. I bought one this spring and like it very much but the trigger is something else. With the Soumi unloaded and my finger on the trigger, muzzle down, the trigger pull greater than the weight of the gun.
This will be taken care of but for the time being I'm enjoying it as is.
 
With the Soumi unloaded and my finger on the trigger, muzzle down, the trigger pull greater than the weight of the gun.
That's the problem; you need to factor in the weight of a loaded drum; bet it's not heavier, then :D

TNW's conversions are notoriously bad triggers, and IIRC, are made up of like 10 moving parts (hence the bad trigger). They do work, though, which is actually good in comparison to some other commercial builds of PPSH's and things which either have light strikes or unintentional bursts of fire far too often for something sold for customers' hard earned money.

There are also AR15 FCG conversions, which I have to assume are a bit better in this regard.

TCB
 
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