The Magpul PMAG 21 GL9 21-Round Glock 9mm Magazine is engineered for superior performance and reliability, featuring a durable polymer construction that withstands rigorous use. This magazine meets the specifications for 140MM competition, providing ample capacity without the need for costly add-ons.Enhanced with a high visibility follower and stainless steel spring, the PMAG 21 GL9 boasts easy maintenance with an easily removable floorplate. Its innovative design includes capacity indicator windows and ridged edges for improved grip and handling.Magazine indicator windows on both sides of body at 21 rounds remainingFlared easily removable floor plate for efficient operationPaint pen dot matrix to easily identify your different loadsDrops free loaded or unloaded while maintaining reliable performanceExperience unmatched reliability and efficiency with the PMAG 21 GL9, compatible with all full-size, compact, and sub-compact double-stack Glock 9mm variants.