Looking for a replacement for your Systema PTW magazines, here's one HK company that will provide what you want... "Hello Sir/Madam, We're the new airsoft manufacturer located in Hong Kong call Andaxworks. We want to promote our new product to your company. Lancer System L5 magazine for Systema PTW. (pls visit our website to see the pictures (click on the screenshot below). This magazine licensing from Lancer System USA.

Testing Video:­

BB loader adaptor Video:

I believe our magazine smoother and lighter  than original ptw mag. since I also the ptw user. I know the original mag or some OEM mag always jam. We use too long time to resolve this problem. And we don't want to manufacture the illegal copies , so, We were contact Lancer System to get the license in first step.
Pls let me know if you interested it, I will sent you the wholesale price list asap. thanks.

Regards,

Andy Leung
www.andaxworks.com"