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The primary purpose of the BoreLock mounting collar is to enable the user to continue using a flash hider or a muzzle brake that is already on the weapon.* Designed for use with the Ase Utra BoreLock equipped suppressors. The tapered surface on the BoreLock Collar blocks almost all of the fouling from going into the attachment thread area, enabling easy removal of the suppressor even after several hundred rounds. 


The BL-mounting collar is threaded in between the muzzle thread and flash hider. This allows the user to continue using the flash hider of his preference, for example A2 flash hider. To be compatible with the BoreLock mounting collar and suppressors, the muzzle device needs to be under 22 mm in diameter and have a maximum length of 63 mm.


NB: With DUAL-S-BL, SL5i, SL6i and SL7i the maximum length of the combination is 52mm.


*No flash hider or brake is included with this item.


For the Ase Utra BoreLock compatible suppressors see here. 


No licence is required for this item in the UK as it is not designed to diminish noise or flash.

    Ase Utra BoreLock Collar

    SKU: AU737
    VAT Included

      Threads / bores available:


      • 1/2"x28 (.223/5.56)


      Phosphate finish and all are supplied complete with thread protector.


      Also available:


      • Hiper flash hider
      • Bird cage flash hider
      • Muzzle brake


      Flash hider variants that are designed to diminish the noise or flash of a firearm, a licence is required for possession in the UK. Sec 57(1)(d) Firearms Act (as amended) 1968. You will find them in the firearms section here. 

    • Unless otherwise stated the price is for a single item, in one colour.

      Dragonfly Ordnance UK accepts no liability for the use (or misuse) of this equipment.

      Pictures are for reference; product delivered may differ slightly to that shown.

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