Another top quality and great value airsoft magazine from Nuprol! This one is a metal cased STANAG style High-Cap magazine for M4 style airsoft rifles which has a capacity of 370 rounds.
The mag is made from Alloy, with Polymer Internals and is a high-cap design which is loaded from the top using the large filling window to pour in BBs and is wound using the lower winding wheel, which feeds BB’s up the feed tube to the hop unit inside your rifle.