Lorraine Lin
53001S is First Limited Edition. Gun barrel is upgrated to copper, and pre-painted 40mm shell.

Qnb Autor
Hi there Lorraine. Very kind of you to respond so quickly! Is that it??

Lorraine Lin
Hi Qnb, I got this information from Zimi's official post:

mp.weixin.qq.com/s/FeSUM8XspGN35ck0Y4pLUw

the last paragraph is talking about the differences: "The first launch edition is priced the same as the standard version. It adds a transparent gun shield, pre-painted 40mm shell casings, upgrades the metal barrel to copper, and improves the model packaging to a premium lift-off box."

Qnb Autor
THANK YOU!!

Not sure it is worth the extra $$...(?)

Qnb Autor
Do you know how many ammunition clips are needed for the storage racks?

Lorraine Lin
Sorry I dont know, not sure if you could get the information from the instruction manual?
scalemates.com/products/img/6/7/3/1511673-16-instructions.pdf

Qnb Autor
No problem. Tried to check as well; your link is MUCH clearer (TY!!!) but sadly still no help...oh well. TY!! You are VERY kind and helpful!!