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The Ase Utra S series SL5i sound suppressors are available in various calibres, from .222 Rem up to 8 mm calibre.

SL5i suppressors are updated and lightened variants of the earlier SL5 suppressor.

Manufactured in Finland by Ase Utra Ltd, the S series SL5i suppressors are manufactured out of 300 series stainless steel and are assembled by welding.

S series SL5i suppressors feature a robust construction and they are built for a long service life.

The S series SL5i suppressor adds only 103 mm to the length of the weapon, the diameter being 44.5 mm.

S series SL5 suppressors are available with a variety of internal threads to fit directly onto the rifle barrel. 

Standard threads include for example M14x1, M15x1, M17x1, M18x1, ½"x20 UNF and 5/8"x24 UNEF to fit most current centrefire rifles.

Other threads are also available.



The S series SL5i suppressors reduce the weapon sound pressure level by 22-30 dB (depending on calibre, ammuntion type, measurement location). 

The S series SL5i suppressors also reduce recoil and muzzle flash significantly.

Rifles tested with the SL series suppressors, comply with the latest personal exposure limit set by the European Directive 2003/10/EC (140 Pa tai 137 dB (C)).


Calibres Infocompatibility chart
S series SL5i .223 all .22 centrefire calibres
S series SL5i .25 .243 Win, 6.5x55 SE ( max.
bullet diameter of 6.7 mm )
S series SL5i .30 all .30 non-magnum calibres
S series SL5i 8 mm 8x57 IS
(Depending on calibre and thread type)
335-345 g
Diameter 44,5 mm
Overall length of suppressor 118 mm ( no spigot thread )
Added length to weapon 103 mm
Finish Blasted stainless or CeraKote
Net sound suppresssion
(1m left of the muzzle, .308 WIn)
(shooters ear, .308 Win)

22-25 dB(A)
22-24 dB(A)
Warranty 2 years