This is a factory Springfield Armory XD(M) magazine. The magazine features a 13 round capacity, steel construction with a polymer floor plate.
Features and Specifications:
Manufacturer Number: XD45452
Caliber: .45 ACP
Capacity: 13 Rounds
Material: Steel
Polymer Floor Plate
Grip X-tension #2
Finish: Stainless
Fits:
Springfield Armory XD(M) Compact .45 ACP
    
            Features and Specifications:
Manufacturer Number: XD45452
Caliber: .45 ACP
Capacity: 13 Rounds
Material: Steel
Polymer Floor Plate
Grip X-tension #2
Finish: Stainless
Fits:
Springfield Armory XD(M) Compact .45 ACP
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                        I have a xdm .45 compact 3.8. I'm looking for new magazines. How do I tell which grip-x tension I need? I noticed there are a couple different choices for my pistol.                    
                    
                    
                            Answer:
                            Hi Mark! Here is Springfield Armory's answer to your question: "It depends on which back strap you have on the grip of your gun. There are three different sizes of back straps 1,2, &3.  If you have back strap #2 on the gun, then you will want to go with the magazine that has the #2 extension sleeve on it.  There should be a Roman numeral I, II, or III on the inside of the back strap (the opposite side of the checkering)."
                        
                        
                    
                        Will this fit xde 3.3 .45 acp?                    
                    
                    
                            Answer:
                            No this will not fit. Check out item # MAG-1036-027.
                        
                        
                    