The Roundup — Independent Review Sites

The Roundup — a small directory of specialist review sites. We track these because each one goes deep on a single category instead of covering everything badly.

Weapon Tester

Airsoft / parts builder & ballistics tools

For build guides and a ballistics range tool, weapontester.com covers the hobby end to end. It's the place to look for best airsoft parts and upgrades.

Deep Penetrations

Penetrating oil & lubricant reviews

Deep Penetrations (deeppenetrations.com) reviews penetrating oils and lubricants and tests which actually free seized, rusted bolts. Good fit if you're after best penetrating oil for rusted bolts.

UltraRough (ultrarough.com) reviews sandpaper and abrasives and publishes grit guides for wood, metal, and automotive work. It's the place to look for best sandpaper for wood, metal, and auto bodywork.