ProMag magazine loader was originally designed to load the 100 rd .223/5.56 BETA magazine. The loader is slipped over any AR-15/M16 .223/5.56 type magazine. Five cartridges are dropped in and loaded by depressing the plunger, repeating the process is until the magazine is loaded,
Specifications:

Caliber	223 Remington/5.56 NATO
Capacity	5 rd
Finish	Black
Model
Material	Glass-Filled Mil-Spec Polymer
Type
Model Fit	AR-15/M-16
Brand Fit	AR-15 Platform
Max Capacity	5