PSA 5.7 Compact Rock 21-Round Magazine

This is the factory flush-fit magazine for the PSA 5.7 Compact Rock. It holds 21 rounds of 5.7x28mm in a black-oxide alloy-steel body and preserves the compact grip length. It is the first spare magazine to buy for the platform because it matches the two magazines supplied with the reference pistol configuration.

The fitment boundary is strict. This 21-round magazine does not fit the full-size PSA 5.7 Rock pistol or frame. The full-size Rock's 23-round magazine can run in the Compact Rock as an extended magazine, but that one-way compatibility does not make the compact magazine interchangeable across both models.