KAK INDUSTRY EXTENDED "FLASH CAN".THIS IS A SOLID 6061 ALUMINUM DEVICE THAT IS DESIGNED TO DIRECT MUZZLE GASES AND THE MUZZLE FLASH FORWARD.THIS DEVICE IS NOT DESIGNED TO REDUCE RECOIL, MUZZLE RISE, OR FLASH SIGNATURE.THIS DEVICE IS DESIGNED TO DIRECT GASSES AND NOISE FORWARD AWAY FROM THE SHOOTER AND ENHANCE THE WEAPONS APPEARANCE..1.360 DIA5.00 LONG6061 ALUMINUMBLACK HARD ANODIZED FINISH7.75 OZ.3/4 WRENCH FLATSBORE CLEARANCE1/2-28 - 9MM or Smaller5/8-24 - 458 or Smaller1/2-36 - 9MM or SmallerM13 LH - 9MM or SmallerCRUSH WASHER NOT INCLUDED