Find It Here: https://doublemdefense.com/product/cgs-suppressors-3-lug-mod9-nautilus-steel-black-cgs-3lug/ 

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Factory New.

UPC: 850002123128
SKU: CGS-3LUG

Item Description:

The CGS internal 3 lug mount is for use only with CGS suppressors models Kraken, Kraken SK, MOD9, MOD9 SK, and Nautilus.