There's no longer a need to search for front and rear bases for your most popular firearms.Weaver base pairs feature tough lightweight aluminum construction to hold up to the most powerful recoil.The weaver cross lock design means a tight secure fit on your firearm.These bases accept all weaver top mount cross lock rings.Fits- mossberg 4x4; rem 700 78 40x 721 725 (all long action); rem 700 78 40x 722 725 (all short action) and rem 700 muzzleloader.Type: 2-Piece BaseModel: Top Mount Base PairsStyle: Top MountMisc: Accepts All Weaver Top Mount Cross Lock RingsFinish: Black MatteMaterial: AluminumPieces: 2Gun Type: RifleMount Type: ScrewsRings Included: No