Detachable Top Mount Base - 61 Gloss BlackManufacture ID: 48061Nobody makes bases to fit as many guns as Weaver. Yet each base is machined to tight tolerances for a custom fit. They're designed to fight the effects of recoil with a square-cut notch that precisely mates to the sturdy cross bolt in every Weaver Detachable Ring. Custom-hardened fastening screws come with every Weaver base.Used as Front base on:- Modern Muzzle Loading- Knight: MK-85 BK-92 (flat receiver)- SAKO: Whitetail HunterUsed as Rear base on:- Modern Muzzle Loading- Knight MK-95 BK-92 (flat receiver)- SAKO: Whitetail Hunter- Savage: 110-116 L/A 210 shotgun(use X-High rings) 10-16 S/A(all pre '03 models)Warranty: Weaver?s Limited Lifetime Warranty: Blount warrants Weaver products to be free of defects in materials and workmanship for as long as it is owned by its original owner. Repair/Replacement will be done when returned without charge except for shipping..