Magazine M4 Midcap 140rds

AMOEBA MAGAZINE WITH A CAPACITY OF 140 BB'S AND WITH A BUILT-IN MAGPULL.

NOTE THAT WITH EVERY MAGAZINE IT CAN HAPPEN THAT THE BB'S DO NOT FEED PROPERLY ON A CERTAIN BRAND OF REPLICA.
THE ADVICE IS TO TRY A DIFFERENT BRAND OF MAGAZINE, IN ORDER TO SOLVE THE PROBLEM.