PWS FSC556 Flash Suppressing Compensator - Gen 2

(25 reviews)
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PWS FSC556 Flash Suppressing Compensator

The Flash Suppressing Compensator (FSC) Series of muzzle devices from PWS provides superior compensation characteristics combined with enough flash suppression to keep the flash out of your optics and line of sight. Designed for both competitive and tactical use, the FSC Series allows for superior muzzle stabilization and aids the shooter in faster follow-up shots and accuracy.

The unique port design of the FSC Series yields muzzle control that meets or exceeds the performance of the best muzzle brakes on the market without the teeth-rattling overpressure indicative of other brakes and compensators.

All of the FSC Series muzzle devices have been classified as a non-flash suppressing device by the BATFE, thus removing any restriction from assault weapon ban states or provinces. A copy of this document is available upon request or on our website at

A PWS signature product, the FSC 556 ships standard on the FNH® SCAR® 16S. Coupling flash suppression with muzzle control, the FSC 556 is an ideal compensator for putting a high volume of rounds on target.


  • Caliber: .223
  • Length: 2.33" (59.2mm)
  • Diameter: .865" (22mm)
  • Thread Pitch: 1/2x28 RH
  • Weight: 2.5 oz (70.8 grams)

Model: 3G2FSC12A1


  • 5
    Works Great!

    Posted by Thomas LaBarre on 30th Jun 2011

    The PWS FSC 556 was a great addition to my BCM midlength 14.5 upper, it's like shooting a .22 kit. The muzzle climb is almost zero, recoil is reduced as advertised. I've been shooting it at the range, and all my other AR's are just sitting in the safe, collecting dust. I love the Comp, and would recommend it to anyone looking for a BA comp.

  • 5

    Posted by Andrew on 16th Jun 2011

    The PWS FSC556 is loud to anyone who is to your immediate left or right. Anybody with common sense can come to this conclusion because of the adjacent ports. This flash suppressor/compensator seems to really tone down the amount of light that is shown during night fire from a forward field of view. It's not going to make your flash magically disappear from all angles. It's sort of concussive but that's not a surprise. I'll take better firing control and flash suppression in exchange for a light headache. Muzzle rise with the FSC556 becomes non-existent. This is especially noticeable if you're used to shooting on a standard A2 birdcage. Installation is a breeze. It comes with a shim set in lieu of a crush washer. A peel washer, a small shim and 8 shims are included. You can easily make adjustments to ensure that you have a secure wrench-tight fit on your barrel. I simply cleaned my threads, greased them, applied the shims and tightened the PWS FSC556 to my barrel.

  • 4
    Best of both worlds?

    Posted by JONATHAN E on 20th Sep 2010

    Well I dont really care what people say, I just dont think its possible to achieve both flash suppression and compensation with THIS STYLE of muzzle device. Though I am extremely happy with my purchase. The device provides a NOTICEABLE reduction in muzzle flip and rise. As well as mild recoil reduction. The device does spit some sparks and stuff onto your arms under certain circumstances. And is pretty concussive, you can feel it on your forehead and sinus area while shooting and if your standing next to it, its worse. I am going to keep this muzzle device mainly because its an effective comp/brake. The flash suppression... well at night all the flash seems to come out of the comp section of it. Overall I do recommend this to my friends.

  • 5
    PWS FSC 556

    Posted by Op4guy on 15th Jul 2010

    The FSC 556 by Primary Weapons Systems is well worth it's price. It's unique design helps channel muzzle blast in such a way that it allows for much faster follow-up shots. The FSC 556 also helps eliminate the muzzle flash with it's extended tines unlike the TTO version. Installation use to be a little tricky but PWS has moved from using a peel washer to a shim set. A crush washer as also an option and will work just fine if you have no intention to mount a suppressor. The biggest drawback I have found is if you are not directly behind the gun it does get a little loud. That said, it has no effect on the shooter itself. I have been running the PWS FSC 556 on my guns for nearly a year and will never go back to a conventional flash hider. This is a great upgrade for your gun and will help you improve your shooting. Well worth the money spent.

  • 5
    Full Auto

    Posted by Anonymous on 12th Jan 2010

    The PWS FSC556 keeps my LWRC M6A2 10.5" barreled SMG (RDIAS) so stable that mag 'dumps' are easily controlled and on target. There is considerable flash coming out the sides during FA fire but the satability is AMAZING. I'm getting one for all my Class 3 weapons in 5.56

  • 5

    Posted by Dan on 24th Dec 2009

    This compensator is one of the best I have used, I use my rifle for deer hunting and shot in low light and there was no flash at all. This comp/flash suppressor is by far one of the best.

  • 5
    Great Muzzlebreak/Flashhider/Comp

    Posted by Unknown on 26th Jun 2009

    A great compensator. It hides the flash extremely well and isn't legally considered a flash hider so you can import this into a "Ban state" like California or New Jersey. It doesn't kick up any more dust than the standard A2 compensator, it doesn't sound any louder either. It does spit a bit of gas back into your lungs at times but nothing bothersome. Reduces recoil quite a bit and is cool looking on top of it all. Overall great product, check out some of the demonstration videos on Youtube to see it in action. I run it on my tactical carbine, and would use it in combat if I had the misfortune of being in that situation.