Fox Creek ArmsFX556S-SS
5.56mm / .223 suppressor · HUB 1.375x24 interface · specs and compatibility from the manufacturer
Notable features
- HUB Compatible
- TBAC Summit Tested
- Full-Auto Rated
- Sealed
length
7.4″
weight
14.4oz
MSRP
$525
length
7.4″
weight
14.4oz
calibers
5.56 | 6.5
material
Steel
interface
HUB 1.375x24
MSRP
$525
Photos
Image: Fox Creek Arms
- Overall length
- 7.4″
- Class
- 5.56mm / .223
- n
- 328
- Range
- 2.5″–9.75″
- Median
- 6.12″
- Diameter
- 1.61″
- Weight
- 14.4 oz
- Material
- Heat Treated 17-4 Stainless Steel
- Max caliber
- 5.56mm / .223
- Base interface
- HUB 1.375x24
- Full-auto rated
- Yes
- Barrel restriction
- 10.5" minimum
- Maintenance
- Sealed (not user serviceable)
- MSRP
- $525
- Class
- 5.56mm / .223
- n
- 292
- Range
- $199–$1,955
- Median
- $899
Longer than most 5.56mm / .223 suppressors
Length compared against the 328 5.56mm / .223 suppressors in the catalog that publish one. Quartile basis; a value inside the middle half carries no note.
Cheaper than most 5.56mm / .223 suppressors
MSRP compared against the 292 5.56mm / .223 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
- HUB 1.375x24
The HUB 1.375x24 is an open standard: 415 mounts and 818 muzzle devices in our catalog fit this suppressor, including Fox Creek Arms Direct Thread Mount (1/2x28), AAC 51T S.T.A.M.P. Mount and AB Suppressor AB Raptor Adapter. You aren't locked into one manufacturer's parts.
Which ones fit your barrel and host?
Check in the BuilderThe Thunder Beast Silencer Summit fires every suppressor entered on the same gun, on the same day, with the same equipment. FX556S-SS was measured in 1 test. Figures can only be compared with others from the same test, so each one links to everything else fired on that gun.
Gas-operated rifles and carbines
Measurements published by Thunder Beast Arms Corp. How to read these
Manufacturer claim
- Full auto rated, responsibly: after 100 rounds the suppressor will need a cool down period.
- Manufacturer-published sound measurement, host 5.56 16" AR: ML 131.67 dBA, SE 142.36 dBA.
- The FX 556S-SS is a full-size 17-4 stainless steel suppressor. Its slightly oversized bore lets it work on 5.56mm rifles as well as 6mm cartridges (6mm CM, 6ARC, 6x47, .243).
- Construction: precision machined, laser welded.
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- HUB compatible: the 1-3/8x24 rear threads accept most standard direct thread mounts as well as QD mounts from other manufacturers, for example the Rearden Atlas and the Bravo ASR.
- For aftermarket mount options the maximum depth is 2" from the rear face of the suppressor to the blast baffle.
- Material: Heat Treated 17-4 Stainless Steel.
- Covered for life against workmanship defect and general use. Damage caused by failure to follow barrel restrictions, bore and caliber sizing, or cool down recommendations may be subject to the cost of the repair. Cosmetic damage such as paint failure due to heat, scratches and dings is not covered.
- Comes with a 1/2x28 direct thread mount.
- Barrel restrictions by model (NR = no restrictions, FA = full auto rated): 223/5.56 10.5"/FA, 6mm (arc,cm,br,.243) 12".