I don't understand what you are asking. The image you posted is of a stock magazine. If yours is cracked or broken along that ridge that you have circled than I would say you have a problem.
If yours looks like the one in the picture..... it's supposed to.
Glock 43 | Glock 26 G4 | Glock 19 G4 BFG | S&W M&P 22 | HK USP 9 | HK USP 45 (Tan) | HK P2000 | HK P30L | HK VP9 | HK 45 C | HK 45 C "Sand" | Walther PPQ 9
Daniel Defense DDM4 V4 | Arsenal SGL 21 | ASA Side-Charger SBR | Savage Mark II FV-SR
Mossberg 590A1 20" SP | Mossberg 500 Cruiser