Mossberg 590 Shockwave 50659 12 Gauge

Reliability with the mini-shells was poor, and this was primarily a test with the mini-shells. Standard 2¾-inch shells functioned fine, however, so it wasn’t an F. Still, the Shockwave is hard to shoot accurately. We’d pass.

By
Todd Woodard
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Published:
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We recently tested three short shotshell-chambered firearms. Top is the new Mossberg 590S Shockwave, which is said to handle 1¾- to 3-inch shotshells interchangeably. Center is a Remington TAC-14 pumpgun, which lacks either the factory capability or aftermarket parts to handle mini shells properly. Bottom is a 590 Shockwave, which we originally tested in 2017 with an OpSol Clip that allowed it to feed and fire mini shells. The problem with the aftermarket parts is they restrict the shotshell firearms to only mini shells. There is little difference between the two bottom shotguns. The Remington is smoother in operation, while the Mossberg 590 Shockwave has a superior safety location and holds one more shell. Also, the Remington features an integral fore end stop to prevent the hand from moving forward. The Mossbergs both use fore end loops.
We first tested this model in the October 2017 issue, the first year the Shockwave was offered. It earned an A grade, with the review saying, “The Shockwave was like all Model 590 shotguns — built to last and well made.
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