Carver Custom's "Open" magwell for the M&P strikes a happy medium. It's big enough to be a full-on competition magwell, yet relatively compact compared to others of its type. If you're looking for a competition part that will work under all the rulesets, and give you maximum performance, this is it. The "Open" Carver is designed for maximum speed and smoothness in the reload. Size-wise it fits a niche between the smallish SSS "ESP" model and the full-on SSS "Limited" -- which offers a very large funnel indeed. Smoothest reload Requires competition-type basepads Designed around Taylor Freelance basepad products Works with most competing brands High value for the price Legal for most practical competitions (except carry optics+production USPSA, SSP division IDPA) SUGGESTED PAIRING: The "Triple Threat" and TF +3, +6, and +10 models all work well with this classic Bobby Carver design. NOTE: We cannot ship this part internationally.