KAK INDUSTRY SLIM EXTENDED "FLASH CAN". THIS IS A SOLID 6061 ALUMINUM DEVICE THAT IS DESIGNED TO DIRECT MUZZLE GASES AND THE MUZZLE FLASH FORWARD.BLACK MILITARY TYPE HARD ANODIZING.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..1.200 DIA5.00 LONG6061 ALUMINUMBLACK HARD ANODIZED FINISH6.12 OZ.BORE CLEARANCE1/2-28 - 9MM or Smaller5/8-24 - 458 or Smaller1/2-36 - 9MM or SmallerM14LH- 30 Cal or SmallerM13LH- 9MM or Smaller3/4 WRENCH FLATSCRUSH WASHER NOT INCLUDED