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Primary Weapons Systems built the FSC556 Mod 2 to do two jobs that usually take two different muzzle devices. It works as a compensator first, taming muzzle rise and felt recoil so you get back on target faster, then adds real flash suppression as a secondary function to keep the fireball out of your optics and line of sight. The trick is in the patented port geometry, which delivers that control without the teeth-rattling overpressure you feel with a lot of aggressive brakes. It's one of the most popular muzzle devices PWS makes, and it earned that reputation the hard way.
Most muzzle devices force you to pick a side. An A2 flash hider handles flash but does nothing for recoil, while a hard-hitting brake flattens the rifle but blasts everyone next to you with concussion. The FSC556 splits the difference and does both jobs well. Running a high volume of rounds, working target-to-target drills, or shooting in low light, this comp keeps the rifle flat and your sight picture clean. PWS builds these in-house from 4140 steel with an FNC LIFE HD treatment, so corrosion resistance and durability hold up to serious round counts.
The 1/2×28 right-hand thread is the standard pitch on the vast majority of AR-15 and .223/5.56 barrels, so this drops onto most builds without drama. What makes install genuinely nice is the included shim set. Instead of fighting crush washers to get your timing right, you just stack the correct combination of shims to clock the device where you want it, and you can add or subtract a shim later to fine-tune without replacing anything. The rear skirt tucks the shims out of sight for a clean look.
This is a proven design. PWS testing was thorough enough that Fabrique Nationale Herstal selected the FSC as the standard muzzle device on the FN SCAR 16, which tells you plenty about how it performs when it counts. Compact at roughly 2.3 inches and light at around 2.5 ounces, it upgrades your muzzle behavior without throwing off the balance of your rifle.
It uses a standard 1/2×28 right-hand thread, which is the common pitch found on the vast majority of AR-15 and .223/5.56 barrels. Just remove your existing muzzle device and thread the FSC556 on in its place. If your barrel is threaded 1/2×28, you're good to go.
A standard A2 flash hider mostly kills flash and does little for recoil, while an aggressive brake reduces recoil but hits you with concussion. The FSC556 is engineered to do both, with recoil reduction as its primary job and flash suppression as a secondary one. The port design also cuts down the harsh overpressure you get from a lot of comps.
No, and that's one of the best parts. It ships with a PWS shim set, so you dial in your timing by stacking the right combination of shims rather than wrestling a crush washer. You can add or remove a shim later to fine-tune the clocking without swapping anything out.
Yes, the unique port geometry is designed to push flash away from the shooter's line of sight and out of your optics. That matters most in low light and with shorter barrels, which tend to throw more unburned powder and a bigger flash. It keeps your sight picture cleaner so you stay on target.
| UPC | 811154030665 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 3G2FSC12A-1F |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Color | Black |
| Model | |
| Product Type | Compensator |
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