S&T Armament 100rnd Mid-Cap Magazine for UST9 AEGs

If you need magazines for your S&T UST9, you are in luck! The S&T 100rnd Mid-Cap Magazine For UST9 AEG is designed for the UST9 Gen 3 and is constructed from high density polymer with detailed mock cartridges visible through the witness windows on each side, making for a very realistic look. As with other Airsoft mid-caps, these magazines are loaded through the fill/feed port at the top of the magazine body using a speed loader or loading tool and won't rattle when you run thanks to their spring-loaded mechanism.