Silencer adapter for Ase Utra Borelock muzzle device – M18x1 or 5/8×24 TPI

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Our silencer adapter for Ase Utra Borelock muzzle device replaces the original insert of yours (Hiper, Bird Cage or other). Thus you will be able to use a direct thread suppressor. Don’t be a prisoner of the Borelock standard, switch to 5/8×24 TPI or M18x1!

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No Ase Utra Borelock silencer ? Use a regular suppressor !

The Borelock from Ase Utra is an excellent system. It allows you to equip your weapon with an Ase Utra muzzle device, and to overlay a silencer on it whenever you want. It is a much-loved configuration in the military and law enforcement. This because it allows you to use a suppressor, without having to unscrew your muzzle brake or flash hider. So why do you need our silencer adapter for Ase Utra Borelock muzzle device ?

Simply to offer you the opportunity to use a normal silencer, not a Borelock one. This way you will no longer have to find a compatible Ase Utra Borelock silencer. You can choose a classic suppressor, with direct thread in M18x1 or 5/8×24 TPI.

Beware, since the collar of the Borelock system stays in place, it will always be necessary to choose a traditional shape silencer, with all the decompression volume at the front. The suppressors that partially covers the barrel won’t be wide enough to “swallow” the Borelock collar.

How does our silencer adapter for Ase Utra Borelock muzzle device work ?

Our custom part takes the form of an insert with a male thread at each end. It replaces the original Ase Utra insert of your Borelock muzzle device. The original insert can be a HiPer or Bird Cage flash hider. Or a muzzle brake with side vents. In both cases, to extract it, you must first unscrew the small Allen cross screw with a wrench. Once this is done, the insert itself can be unscrewed in the anti-clockwise direction.

Once the original insert is out, you end up with what Ase Utra calls the “Borelock mounting collar”. All you have to do is screw our silencer adapter for Ase Utra Borelock muzzle device instead. Don’t forget to put the little Allen cross screw back in its place.

Note that the threading that fits into the mounting collar is itself an M18x1. But it is interrupted by a smooth section, to allow the Allen indexing screw to be tightened.

High-end manufacturing, like the Ase Utra Borelock is

Ase Utra being top notch in the professional muzzle devices market, we take great care to ensure that our custom silencer adapter is on the same level. So we make it in XC38 steel (also known as C35) on CNC machines. This ensures flawless machining accuracy and perfect concentrity.

Developed and manufactured in France by a team of shooters, this silencer adapter for Ase Utra Borelock muzzle device can evolve to suit your needs. Today, we machine it with a 5/8×24 TPI or M18x1 output thread (15 mm long), as these are the most common standards for long guns direct thread silencers. But if tomorrow, you need a different interface, contact us, and we’ll see if we can make you a special one. We ship worldwide !

Additional information

Weight 60 g
Dimensions 45 × 22 mm


Maximum bullet diameter

.354 in (9 mm)

Accessory thread

5/8×24 TPI, M18x1


Blued steel


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