CGS GroupHelios QD
.30 Cal / 7.62mm suppressor · CGS QD interface · specs and compatibility from the manufacturer and independent testers
Notable features
- No Barrel Restrictions
- PEW Science Reviewed
- Full-Auto Rated
length
6.5″
weight
19oz
MSRP
$1,650
length
6.5″
weight
19oz
calibers
5.56–.30
material
Steel · Inconel
interface
CGS QD
MSRP
$1,650
- Overall length
- 6.5″
- Diameter
- 1.75″
- Weight
- 19 oz
- Class
- .30 Cal / 7.62mm
- n
- 513
- Range
- 4.4 oz–39.8 oz
- Median
- 13.75 oz
- Material
- 718 Inconel / 17-4 Stainless Steel
- Max caliber
- .30 Cal / 7.62mm
- Base interface
- CGS QD
- Front cap
- none
- Full-auto rated
- Yes
- Barrel restriction
- None (manufacturer stated)
- MSRP
- $1,650
- Class
- .30 Cal / 7.62mm
- n
- 458
- Range
- $199–$2,160
- Median
- $999
Heavier than most .30 Cal / 7.62mm suppressors
Weight compared against the 513 .30 Cal / 7.62mm suppressors in the catalog that publish one. Quartile basis; a value inside the middle half carries no note.
Pricier than most .30 Cal / 7.62mm suppressors
MSRP compared against the 458 .30 Cal / 7.62mm suppressors in the catalog that publish one. Quartile basis; a value inside the middle half carries no note.
Prices are manufacturer's suggested retail (MSRP). What you pay may differ.
- Base interface
- CGS QD
- Front cap
- none
The CGS QD is an open standard: 5 mounts and 188 muzzle devices in our catalog fit this suppressor, including CGS Group CGS Helios Taper Mount (5/8x24), Rearden Helios QD Atlas and CGS Group CGS Hyperion Thread Adapter (1/2x28). You aren't locked into one manufacturer's parts.
Which ones fit your barrel and host?
Check in the BuilderPEW Science · independent test
This suppressor has been independently sound-tested by PEW Science in 2 reviews.
Manufacturer claim
- Features patented 'Varying Core Diameter' technology unique to CGS Suppressors, described as unlike anything previously seen in the firearms industry.
- The Varying Core Diameter design provides peak sound reduction for its size, elimination of flash signature, and consistent, minimal, and repeatable point of impact shift.
- Uses a taper interface between the muzzle device and suppressor to prevent carbon lock on muzzle device threads.
- Features a .36 bore diameter that significantly reduces back pressure and muzzle flash while enabling multi-caliber compatibility.
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- Features interchangeable rear caps and interchangeable front caps for versatile configuration options.
- The patented ″Varying Core Diameter″ technology unique to CGS Suppressors is unlike anything the firearms industry has ever seen before.
- This unique design allows for peak sound reduction for its size and elimination of the flash signature as well as consistent, minimal and repeatable point of impact shift.
- By using a taper interface between the muzzle device and the signature suppressor, we ensure the muzzle device threads will not carbon lock.
- The generous .36 bore significantly reduces back pressure and muzzle flash while also allowing the suppressor to be used with multiple calibers.
- The HELIOS QD comes with a 1/2×28 threaded rear cap, a 5/8×24 threaded rear cap, and an adapter ring threaded in 1.375×24 to accept a plethora of industry QD mounting solutions.
- A sealed front cap is provided for the maximum sound reduction possible.
- A ported front cap is included to ensure blowback mitigation for left hand shooters or for use with calibers or weapon systems that may be prone to over-gassing.
- The Helios QD utilizes a full DMLS 718 Inconel design chosen for maximum strength and extreme durability.
- The HELIOS QD utilizes a full DMLS 718 Inconel design for maximum strength and extreme durability.
- The Helios QD is full auto rated with no barrel length restriction and is rated to handle up to and including 300 Norma Magnum.
- Carries a lifetime warranty, and the serial ring can be removed and welded to a new core if needed.
- CGS fully warrants the Helios QD on the Maxim Defense PDX and MDX line of firearms in any caliber, any barrel length, and in both semi and fully automatic firing modes.
- The Helios QD is designed specifically for 5.56mm rifles and carbines.
- Ships with a 1/2x28 threaded rear cap, a 5/8x24 threaded rear cap, and an adapter ring threaded in 1.375x24 to accept industry QD mounting solutions.
- Includes both a sealed front cap for maximum sound reduction and a ported front cap to mitigate blowback for left-handed shooters or over-gassed systems.