Quick view Glock Glock Oem, Glock Mf10031 Mag G31 357s 10r Pkg $22.71 $19.14 This replacement or spare magazine is compatible with your glock 31.Caliber: 357 SigCapacity: 10rdFinish: BlackModel: OEMMaterial: PolymerType: DetachableModel Fit: G31Brand Fit: GlockCapacity: 10 Compare Add to Cart