Magblock 10/30 MCL (Magazine Capacity Limiter) for Magpul 30 round Steyr Aug Pmags in .223/5.56mm.

- This block will replace the lower spring attachment point  or locking plate and convert a 30 round magazine to hold only 10 rounds.

- The Pmag dust covers will still fit when loaded.

- Magazines can be loaded with the bolt closed.

- Does not affect reliability.

- No increase in spring pressure.