ONLY pick this upgrade for earlier models of M27 Progressive Linkers utilizing fixed link tower.
Large capacity upgrade for M27 Progressive linker, includes magazine upgrade (link magazine base, weighted follower, 3 of 35 link magazines) and a 100 round agitated hopper.
Hopper and magazine functionality can be seen here: https://youtube.com/shorts/pk4FUKseL2M?feature=share
