The Featherweight 88 Is a silencer especially designed for rimfire calibers .22WMR, .22LR. .17 HMR.
It has an all metal construction designed and built for longevity. 
Aerospace 6061 T6 aluminum is used for the whole construction and it is hard anodized for maximum wear resistance. The result is an effective and light weight design that shares many of the design qualities of our larger models.
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SPECIFICATIONS
Suppression: 35+ dB
Weight: Approx. 88g
Core: Aerospace 6061 T6 aluminum
Total Length: 123 mm 
Length in front of muzzle: 113mm
Diameter: 32.5 mm
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CALIBERS //  (.22lr+.22 lrm)  and in .17 hmr
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THREADS // ½”20 and ½”28 Front mount