Check the listing for details. Speed Loader for MPX 9mm Magazines. Condition: New. Listed at 40.00 USD. My custom Sig Sauer MPX magazine speed loader is reliable, simple, and easy to use. The speed loader for designed for competition shooting for efficiency of loading magazines between stages. The speed loader was designed for loading 11 rounds per cycle for a total of 33 rounds loaded in the MPX magazine after 3 cycles. When MPX magazines are over loaded to 36 rounds or even specified 35 rounds, the magazine can cause malfunctions of the MPX. 33 round loaded magazines allow for ease of inserting into the MPX and charging the MPX bolt with the magazine inserted. This speed loader is designed specifically to hold the latest 35 round model Sig Sauer OEM MPX magazine (SKU 8901025) in place while loading and is not compatible with other aftermarket and OEM transparent MPX magazines. Sig Sauer MPX Magazine and snap caps are not included with sale. Thank you for your interest!