Year after year, ProMag has increasingly become one of the leading manufacturers of firearms magazines in the world. Gun enthusiasts and law enforcement personnel have agreed,  be it for recreational "plinking", competition shooting, or law enforcement, Promag is the source you can count on. 
This is ProMag for Glock 42 .380 ACP 10 Round Polymer magazine. This magazine is constructed of a proprietary Dupont Zytel derived high impact polymer, with a steel insert for added rigidity to the feed lips. ProMag magazines include a lifetime guarantee, if you ever have a problem with their magazines; simply return them to ProMag for replacement. When you need a cost effective aftermarket replacement mag that you know you can count on, you need a ProMag!
Features and Specifications:
This is not a Glock Factory Magazine, it is an after market Magazine
Manufacturer Number: GLK-11
ProMag For Glock 42 .380 ACP Magazine Ten Rounds Black Polymer
Caliber: .380 ACP
Capacity: 10 Rounds
Body Material: DuPont Zytel polymer
Spring Material: Heat Treated Chrome-silicon Wire
Follower Material: Self lubricating, polycarbonate follower
Follower Color: Black
Base is molded from DuPont Zytel polymer
Steel insert for added rigidity
Finish: Black
Fits:
Glock 42
    
            This is ProMag for Glock 42 .380 ACP 10 Round Polymer magazine. This magazine is constructed of a proprietary Dupont Zytel derived high impact polymer, with a steel insert for added rigidity to the feed lips. ProMag magazines include a lifetime guarantee, if you ever have a problem with their magazines; simply return them to ProMag for replacement. When you need a cost effective aftermarket replacement mag that you know you can count on, you need a ProMag!
Features and Specifications:
This is not a Glock Factory Magazine, it is an after market Magazine
Manufacturer Number: GLK-11
ProMag For Glock 42 .380 ACP Magazine Ten Rounds Black Polymer
Caliber: .380 ACP
Capacity: 10 Rounds
Body Material: DuPont Zytel polymer
Spring Material: Heat Treated Chrome-silicon Wire
Follower Material: Self lubricating, polycarbonate follower
Follower Color: Black
Base is molded from DuPont Zytel polymer
Steel insert for added rigidity
Finish: Black
Fits:
Glock 42
Glock 10 round mag break in
                            
                        
                            First time I used the extended magazine it misfed frequently, the second and third time there were no more misfires. So there was a short break in of 10 rounds                        
                    
                    
                    August 30, 2024
                    
                Glock 42 10 round magazine
                            
                        
                            Fits great,Extends the hand grip and fits well in my hand on top of 4 extra rounds.Thank you                        
                    
                    
                    July 21, 2024
                    
                Defective manufacturing
                            
                        
                            The metal inner case was bonded to the polymer too high. This causes the 2nd or 3rd round fired to nose dive into the forward magazine wall resulting in the slide failing to feed. Strangely all 3 mags I bought do the same thing consistently. The rest of the rounds fire flawlessly. So if it's loaded with 8 rounds instead of 10 they seem to work. They're defective in quality control.  I could tell them how to fix their manufacturing defect,  but I just did. I do like the Full grip the magazine gives to the G42. I would send them back under tha so called lifetime warranty, but it wouldn't help  since they're probably going to send more defects.  It's a shame.                        
                    
                    
                    July 9, 2024
                    
                Pro mag magazines for Glock 42 380
                            
                        
                            As of now, I have only fired about 50 rounds through each magazine. They both seem to function very well no problems no load problems. They fit the pistol very well. They fit in the Magwell very snug and Drop free  win empty They make a nice extra bit of grip on the bottom of the short Glock 42, 380 pistol                        
                    
                    
                    June 24, 2024
                    
                
                        
                            Very nice sturdy mag, feels right                        
                    
                    
                    June 4, 2024
                    
                Good with FMJ, doesn't work for JHP
                            
                        
                            Work fine with FMJ. JHP, not so much. One of the 2 I purchased will not even load hollow points. They get stuck, and I had to bang it on the table to get them out.  Tried a few times with 2 different brands. The other can load, but will constantly fail to feed.But, if you only need them for practice or only use FMJ, they work fine.Yea, they do seem a little loose, as others have mentioned.                        
                    
                    
                    December 10, 2023
                    
                Failed GLK-11
                            
                        
                            Bought 2 GLK-11 magazines to enhance range training. Second day using these Mag's one failed to retain rounds allowing them to fall out and become useless and hazardous during tactical reloading. The third day of training the second mag failed in the same way leaving me with lower capacity mags that came with Glock 42 to complete the rest of the week with handicap capacity. Very disappointed, at least they failed during training and not live combat. I would be cautious of intended use of these mags.                        
                    
                    
                    July 14, 2023
                    
                Nice mag
                            
                        
                            Fits the gun nicely                        
                    
                    
                    April 12, 2023
                    
                
                        
                            Fits great and mag works beautifully with my G42                        
                    
                    
                    November 28, 2022
                    
                
                        
                            pro mag is an excellent brand for magazinesno one else had the 10 round magsI am very happy with themty                        
                    
                    
                    October 27, 2022