Straight answers about firearms and calibers

MaxFirearms has been helping shooters make sense of calibers, ballistics, and gun choices since 2016. No hype, no brand worship — just the information you need before you spend money.

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What is the best caliber for home defense? 9mm vs .45 ACP vs .380 — penetration, capacity, and why the argument never ends.
5.56 vs .308: which rifle cartridge do you actually need? A practical comparison of the two most common centerfire rifle rounds in America.
First AR-15: what to know before you buy Caliber, configuration, and the accessories that matter versus the ones that don't.

Choosing a caliber is only half the decision. Once you know what you shoot, keeping it stocked is the other half. Our ammo & gear resources page collects reliable places to buy ammunition by caliber and category.

Popular caliber guides

We maintain plain-language guides for the calibers most shooters actually use — from 9mm and .22 LR to 5.56 NATO and 12 gauge. Each one covers recoil, intended use, and what to expect at the range.