The Wildcat Whisper is an Over Barrel Design Moderator made from Coated Alloy and Stainless Steel fitted with a 1/2 inch UNF Thread.

The Whisper .22 is available in 1/2UNF and 1/2UNEF

Available in .17HMR (not applicable for .17 hornet) and .22Rimfire – Please specify Calibre

Can be completely dismantled for cleaning, maintenance and replacement of worn parts. 
Material: Alloy & Stainless Steel with Special Surface Coatings
Thread: .17 is 1/2UNF / .22 in 1/2UNF and 1/2UNEF
Weight: 160g
Overall Length: 175mm
Over Barrel Length: 75mm - will accommodates barrels up to 24mm Diameter
Forward Length: 100mm