OSS Helix 5.56 (HX 556) - 1/2X28 Muzzle Brake Included

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***Item has been Discontinued


HELIX 556 (HX 556)

The HELIX 556 (HX 556 ) is an integrated flush mount system built with titanium, stainless steel and cobalt.  The HX 556 dramatically reduces backpressure, blowback, sound, flash signature, and was designed for professional use including full-auto rated (NOT sustained full-auto fire).  A self-tightening mounting device, the STS-Muzzle Brake (1/2 x 28 TPI), is included with each suppressor.

Currently, additional OSS STS-Brakes are not available from OSS. However, with the purchase of a separate STS Flash Hider, the HX 556 can be quickly switched between your 5.56 guns. Just thread the HX 556 onto the STS Flash Hider, hand tighten and you’re ready to shoot.

Click  HERE to purchase additional STS Flash Hiders.



Additional Information
Manufacturer OSS (Operators Suppressor Systems)
Model Helix 556 (HX556)
Type Rifle Flush Mount Suppressor
Caliber .223/5.56mm
Weight 20.8oz
Length 6.8″
Finish Matte Black
Mount Thread Mount (Must use STS-Muzzle Brake)
Decibel Reduction -33dB
 Full Auto Rated  YES (NOT sustained Full Auto Fire)

Additional Information Content

Modern Warriors

We started Modern Warriors for the sole purpose of providing a less expensive way to enjoy our love of buying and shooting some really cool stuff. What started as a hobby has turned into a business where we have developed the experience and ability to help you enjoy our same hobby and save you money in the process.

We specialize in tactical weapons, including suppressors, short barrel rifles and full auto weapons. We have routine experience in shooting the weapons we carry, so if you want our opinion on how a weapon operates, we will gladly provide it. We also have expertise working with licensed professionals in setting up gun trusts, which is an ideal way of purchasing, owning and operating any weapon restricted by the National Firearm Act. Don’t let the word “trust” scare you. It is very easy to set one up if you have the right help.

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