GrovTec US Anschutz T-Nut Rail Adaptor Set Black. Uses M-Lok hardware and a custom T-Nut. Specifications for GrovTec US Anschutz Adaptor Sets: Manufacturer: GrovTec US Color: Black Finish: Type III Hard Anodized & Oxide Features of GrovTec US Anschutz Adaptor Sets Designed To Convert A Pre-Installed Anschutz Rail To A Picatinny Bipod Mount. Uses M-Lok Hardware And A Custom T-Nut Steel & Aluminum Parts Type III Black Hard Anodized Finished & Black Oxide Finish Package Contents: GrovTec US Anschutz Adaptor Sets What firearm models does the manufacturer say GrovTec US Anschutz Adaptor Sets is compatible with? The manufacturer suggests that GrovTec US Anschutz Adaptor Sets is compatible with UniversalGrovTec US GTSW325: Anschutz T-Nut Rail Adaptor Set Black