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 17 G4 FDE | S&W M&P 22 | S&W M&P 45 | S&W M&P 9 | Sig P226 MK25 | Sig P229 Extreme | Sig P227 Carry | Sig P320 F | Sig P320 C | HK45 | HK 45 CT | HK USP 9 | HK USP 45 | HK VP9
Daniel Defense DDM4 V4 | Arsenal SGL 21 | ASA SBR | Savage Mark II FV-SR | Mossberg 590A1 20" SP | Mossberg 500 Cruiser
My Instagram (mostly gun pics)