This high quality magazine has a heat treated, stainless steel body with smooth fully machined feed lips. Features tempered springs, round-count witness holes and extended bumper pad. Fits Government and Commander models.
If the grips on your 1911 measure 4" long, you have a Government/Commander length grip. If the grips on your 1911 measure 3-1/2" long, you have an Officer/Defender length grip.