What MP5 do you have? Brand?
Many MP5's have a threaded outer barrel or a threaded tip to the tri-lug, which is either part of the outer barrel or threaded on to the outer barrel.
Airsoft Parts has a tri lug silencer available (no adaptors required)
http://www.airsoftparts.ca/store2/in...oducts_id=2090
Happy?
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