"FWS Defender" barrel extension for SA 61 and its variants

Barrel extension for the SA 61 submachine gun.
This is our original design.
It will allow you to mount the original collet silencer together with our SA 61 Defender Mk.2 upgrade kit.
 
It gives the possibility to clamp a silencer and other muzzle devices. 
A collet is used to clamp the barrel, which is fitted with two pairs of M4 screws. 
Installation does not require any intervention on the weapon.
 
The reduction is compatible with the SA 61 Defender MK.2 upgrade kit
 
 
TECHNICAL DETAILS:
Caliber: 7.65 Br
Width: 20 mm
Height: 28 mm
Length: 74 mm
Weight: 103 g
Material: refined steel
Surface treatment: sandblasted, alkaline oxidized