Earmor M31 Plus Electronic Ear Muffs — Tactical Headset, NRR 22

The Earmor M31 arrives at the range from a different direction than its American rivals: OPSMEN builds tactical headsets, and it shows — gel ear pads where the category ships foam, a connectorized build, and up to 5X ambient amplification behind an NRR 22 shell with compression above roughly 82 dB. The M31 Plus build documented here is the middle of the Earmor trio.

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Why the Earmor M31 stands out in the electronic tier

Most range muffs are built down to a price; tactical headsets are built up to a spec, and the M31 inherits the second tradition at the first tradition's price point. Gel pads seal around eyewear temples where foam gaps, the connectorized build hints at the comms platform it shares DNA with, and the 5X amplification ceiling out-hears most of the tier. Our full M31 review rates it 4.4/5; the best electronic shooting muffs guide ranks it against the field.

What the listing documents

From the published specs: an electronic hearing protector rated NRR 22 dB; up to 5X sound amplification; automatic compression of impulse noise above ~82 dB against gunshot peaks of ~140–165 dB; gel ear pads; a connectorized tactical-headset build — the Earmor M31 Plus generation. As m31 electronic ear protection it targets shooters first; the opsmen earmor brand behind it builds the tactical comms gear the design language comes from. The Razor Slim review covers the benchmark it undercuts on pads, and the four-mic Quad BT is the directional alternative.

Where the M31 sits in the Earmor trio

Earmor splits the line by format and capability: the M20 moves the electronics in-ear, this M31 is the core listen-only muff, and the M32 adds a communications microphone for radio integration. Reviews of the M20 and M32 map the ladder; cross-brand, the Walker's Razor Slim is the American benchmark and the Caldwell E-Max Pro the refined value play.

Electronic shell, passive math

Compression handles impulses; sustained noise rides the passive NRR 22, so run the standard numbers — the NRR explained guide covers derating and the calculation walkthrough applies it to your exposure. All-day steady noise beyond the envelope belongs to high-NRR passive muffs from the passive muffs guide; electronic vs passive draws the boundary and the when-do-you-need-hearing-protection pillar maps the thresholds.

Ownership: pads, batteries, and crew orders

Gel pads outlast foam but still age — replace them when they stiffen or tear, since the seal carries the rating — and keep spare batteries in the range bag. Indoor and magnum sessions pair with foam plugs from the hearing protection collection; ear plugs vs ear muffs explains the doubling logic, and the best hearing protection overview compares every format. For range or crew orders, quantity purchasing runs through a free Amazon Business account — volume pricing, PO numbers at checkout, and tax-exempt eligibility for qualifying organizations, with the walkthrough linked in our footer.