jet-Z CQB-BL& jet-Z CQBS-BL


Calibre Info compatibility chart
jet-Z CQB-BL
.223 Rem / 5.56 mm NATO
jet-Z CQBS-BL .223 Rem / 5.56 mm NATO
Weight ( updated ! )
CQB-BL 550-570 g
CQBS-BL 460-480 g
40 mm
Overall length of
suppressor /
Added length to weapon

CQB-BL 175 mm / 115-130 mm
( depending on flash hider )
CQBS-BL 145 mm / 85-100mm
( depending on flash hider )
Net sound suppression
(ref. U.S. MIL-STD-1474D)
15-31 dB (A)*
2 years

Sound pressure level with most 5.56 mm calibre assault rifles:

Right handed shooter, left ear c. 131-135 dB, right ear c. 137-144 dB ( unsuppressed level c. 158-162 dB )
1 metre left of the muzzle, 134-143 dB ( unsuppressed level c. 165-167 dB )


Ase Utra jet-Z™ CQB-BL and CQBS-BL suppressors are lightweight, ultra-compact assault rifle suppressors designed for professional use in .223 Rem / 5.56 mm NATO calibres.

Various BoreLock flashhider mounts are available, to adapt the suppressors to a multitude of assault rifles, without permamant modifications to them.

» BoreLock combatibility chart
» Suppressor and flash hider / muzzlebrake product code chart

Manufactured in Finland by Ase Utra OY, the jet-Z™ CQB-BL and CQBS-BL suppressors incorporate Ase Utra's patented jet-Z™ baffle system.

jet-Z™ CQB-BL and CQBS-BL are all-steel, all-welded units rated for professional use on semiautomatic and select fire weapons.

The tapered surface on the BoreLock flash hider blocks almost all of the fouling from going into the attachment thread area, enabling easy removal of the suppressor even after several hundred rounds.


jet-Z™ CQB-BL and CQBS-BL suppressors reduce the sound pressure level of a an assault rifle by c. 15-31dB, depending on weapon type and measurement location.

In addition to the reduction in sound signature, the suppressor also reduces recoil and an added benefit is the elimination of visible muzzle flash, especially for military users.

CalibreSuppressor model
jet-Z CQB jet-Z CQBS jet-Z CQB-BL jet-Z CQB-BL 7.62 jet-Z
Compact .25
jet-Z Compact .30
204 Ruger       o  
222 Rem   o  
223 Rem   o  
22-250 Rem       o  
243 Win o o       o
260 Rem no no no   no o
7MM-08 Rem no no no   no no
308 Win no no no no no
338 Federal no no no no no no no
25-06 Rem no no no   no o
6.5X55 SE no no no   no o
270 Win no no no   no no
7X64 no no no   no no
30-06 Sprg no no no   no no
9.3X62 no no no no no no no
9.3X66 SAKO no no no no no no no
7 mm Rem Mag no no no   no no no
300 Win Mag no no no   no no no
338 Win Mag no no no no no no no
.338 Lapua Mag no no no no no no no
.375 H&H Mag no no no no no no no
- Recommended
o - Reasonable to use*
no - Do not use
    - Can be used**
* Suppressors can be used on these calibres, however the bullet channel is oversized compared to the calibre, possibly affecting suppressor performance. Also the suppressor may be too short, when compared to the power of the calibre.
** Safe to shoot, however the difference between the suppressor bullet channel and
calibre is quite excessive and clearly affecting the suppressor performance.

» See the compatibility chart of all suppressor models