New for 2024, it looks like this is a variant of the former HS12/Thunder Ranch version that was discontinued pre-Covid.
The Mossberg Silver Reserve Eventide HS12 is built around the same dual locking lug, boxlock action with extractors and chrome-lined barrels of the other shotguns in Mossberg’s over-under Reserve series. Its features have been optimized for personal protection. The HS12 is a 12 gauge with 3” chambers and has 18.5” barrels with fixed cylinder bore chokes.
~$600-$620 on GB.
www.americanrifleman.org
www.mossberg.com
This older review should still be valid.
www.shootingillustrated.com
The Mossberg Silver Reserve Eventide HS12 is built around the same dual locking lug, boxlock action with extractors and chrome-lined barrels of the other shotguns in Mossberg’s over-under Reserve series. Its features have been optimized for personal protection. The HS12 is a 12 gauge with 3” chambers and has 18.5” barrels with fixed cylinder bore chokes.
~$600-$620 on GB.

An Official Journal Of The NRA | New For 2024: Mossberg Silver Reserve Eventide HS12
After introducing its Silver Reserve Eventide series of over-under shotguns earlier in 2024, Mossberg expanded the line yet again mid-year with the HS12 variant designed for defensive use.

Mossberg International Silver Reserve - Eventide HS12
Silver Reserve Eventide break-action shotguns feature synthetic stocks and forends, shell extractors, chrome-lined barrels and bores, and dual-locking lugs for durability and a multitude of applications including sporting, hunting, and personal protection.

This older review should still be valid.

An Official Journal Of The NRA | Review: Mossberg Maverick HS12 Shotgun
The Mossberg Maverick HS12 shotgun is aimed at providing a home-defense option that's as simple as a double-barrel hunting gun.
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