Wilson Combat Super Stoc Retro Fit Kit AR10. These tubes should be used with stocks such as the Rogers USGI BCM Colt LMT SOPMOD VLTOR Stag Arms Magpul CTR (Milspec) and others that are made to the Mil-Spec -carbine length-tube size. Specifications for Wilson Combat Super-Stoc Retro-Fit Kit: Manufacturer: Wilson Combat Condition: New Package Contents: Wilson Combat Super-Stoc Retro-Fit Kit Receiver Extension. Receiver End Plate. Receiver Castle Nut. AR-10 Carbine Weight Buffer. AR-10 Carbine Weight Action Spring. Compatible with AR-10/SR-25/WC-10/LR308. What firearm models does the manufacturer say Wilson Combat Super-Stoc Retro-Fit Kit is compatible with? The manufacturer says that Wilson Combat Super-Stoc Retro-Fit Kit is compatible with AR-15 M4 M16 AR-10Wilson Combat TR-SUPERSTOC-K-10: Super Stoc Retro Fit Kit AR10