Retro AR-15 Extended Flash Hider 4"

(5 reviews)
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Design inspired by the XM-177 Moderator, this extended flash hider will extend a 12.5" barrel to legal non-NFA length when pin and welded. 

  • Overall Length- 4.15" (adds approximately 3.56" when pinned and welded, 1" in diameter
  • Weight- 6.4oz
  • 5 flash hiding ports, sealed bottom similar to an A2 flash hider
  • .125" hole pre-drilled for pin and weld
  • Heat Treated for strength & durability 
  • Phosphate Coated for corrosion resistance 
  • Milled flats for easy installation
  • CNC machined from bar steel
  • Fully Precision Machined in House at KAK Industry

Crush washer not included

Flash Hider
Pin and Weld:
Drilled for Pin and Weld


  • 5
    My go to retro flash hider

    Posted by A. Magno on January 11, 2024

    I've always been a fan of the GAU5 and CAR15 series of rifles and this particular muzzle device scratches that itch whenever I put one together. For the quality of this hider the price can't be beat. It doesn't feel cheap and has a good weight to it. The phosphate finish works great if you desire to keep an original milsurp look while also serving as a suitable substrate for aftermarket paint. I personally own three of these and two of them are pin and welded to 12.5" barrels which kept those rifles non-nfa while still maintaining that commando rifle look. So if you are looking to put together a Blood Diamond, Nam shorty, 80s era commando rifle or some commando hybrid like my rifles, I highly recommend this muzzle device.

  • 5
    It's the best looking xm177 flash hider

    Posted by Andrew on December 25, 2023

    Most xm177 flash hiders you see for sale sometimes are too long or skinny and can look goofy. KAK was perfect. And KAK was thinking ahead by offering this in 5/8-24 so I could build a retro XM177 clone in 300aac. If I had only one complaint it would be that when I opened up the package it had a dent because it must have been dropped onto a hard floor before they shipped it out. Not a big deal but cosmetically slightly messed up. But I still love it and it was a smoking good price too

  • 5

    Posted by Peter Keane on November 14, 2023

    The pre drilled pin /weld hole makes my gunsmith very happy. Awesome device

  • 5
    Hell Yes

    Posted by Robert R on November 12, 2023

    This thing is nothing short of awesome. Extremely well made and reliable.

  • 5
    Looks and Works Great!

    Posted by Matt H on August 31, 2023

    I wasn't sure how this was going to look on my 13.7 AR Pistol. I needed something longer to pin and weld, (Thank you AFT) and found this. I honestly thought it was going to look and feel cheap because of the low price. I was very surprised to find the quality and fit to be very high quality. Looking forward to seeing what else KAK Industries sells now.