Welcome to Oulun Työstökeskus Ltd.!

Oulun Työstökeskus Oy (Finland Fine Machining Ltd.,) is a Finnish company that manufactures and sells gun accessories such as silencers, adapters, bipods, picatinny rails, backfoots, Ruger shoulder stocks, screwdriver sets and cleaning rods.

Oulun Työstökeskus Oy's products (or SAK products) have been patented in Finland and/or foreign countries. Founded in 1982, up to now, we can proudly present 14 different designs of silencers to support gun users.

Email: sak@ouluntyostokeskus.com
Phone number: +358-8-3113133, +358-40-5085833
Opening hours: mon-fri 8.00 - 16.30



We are looking for
Please contact us if you are interested in selling our products

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Marlin 45/70 and Front Mount 105mm Ultra Alfa suppressor and Ruger 10/22 with SAK-SILENCER, threadings 1/2-28 UNEF or 1/2-20UNF


Note: For some products, we also sell directly to individual customers.
Please order with the form below or by sending us email with your name, your valid address and telephone number.

Order form Contact us

SAK Silencers

SAK FocusPoint, SAK and SAK2 silencers, SAK Hornet Silencer, SAK Alfa, Ultra Alfa and Ultra Alfa tele silencers, barrel thread protectors

SAK Adapters

Ruger Mark II-III bajonet adapter, Browning Buck Mark bajonet adapter, Sig Sauer Mosquito .22 adapter, Walther P22 adapter, Walther G22 adapter

SAK-MILrs Bipod

SAK-MILrs rifle bipods and other shooting rests, SAK-MIL camera adapter, monopod and SAK camera adapter, SAK picatinny adapter for SAK-MILrs bipod

SAK Gunsmith's Screwdriver Set

From stainless steel
Durable plastic case
Comes with 6 bits and adapter for 1/4" shells
Can be turned to 90 degree angle

SAK Picatinny Rails

SAK picatinny rails, UIT-rails, picatinny adapters, SAK picatinny adapter for SAK-MILrs bipod

SAK Vise for precision mechanics

The clamp is suitable for professional and hobby use in the aspects of engineering, electronics industry, models, as well as handcraft prototypes.

SAK Ruger Shoulder Stock

SAK Ruger III Shoulder Stock: for Ruger mark II/III, Browning Buck mark, Thompson Center, etc., suitable for all .22 pistols having Picatinny-rails, no tools needed for mounting

SAK Cleaning Rods

SAK Cleaning rods 220, 250, 650, 800, 900, 1100 and 1200mm

SAK Cleaning Wire

SAK cleaing wire for rifles: you only need one SAK-cleaning wire regardless of the calibers.


SAK BACKFOOT fixationsbolt for strap and SAK BACKFOOT fixation for Picatinny rail

Barrel thread protectors

Rifle thread protector, threading of 1/2-20UNF/normal European threading.


Produced new serie of SAK cleaning rods. Now also 650mm length available.
Produced new serie of SAK cleaning wires.
More Picatinny adapters for bipods are in stock!
New Ruger bajonet adapters are ready for your silencers!!


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