Originally Posted by L473ncy
Yes all mags (of the same type) are 100% interchangeable between brands. A little bit of filing or taping may be required (tolerance issues) but for all intents and purposes you can use any brand mag in your gun.
Nope. This is not true. Examples include KJW and TM M9, G&G/CA & TM M14 just to name a few. Sometimes yes, sometimes no. Saying they will work 100% of the time is just a fallacy.