Quick view AB SUPPRESSOR Ab Suppressor Raptor, Ab F22-adapter Raptor Adapter 1.375-24 $40.25 $35.00 The raptor adapter is a thread conversion piece which takes the proprietary base-end tpi of the raptor series, and converts it to the industry standard 1.375 x 24 tpi.Length: 0.200"Model: Raptor Compare Add to Cart