Rimfire World is an information resource for .22 LR shooters, covering rimfire firearms, equipment, and aftermarket upgrades. Its content features product reviews, project ideas, comparisons, and practical information for enthusiasts interested in platforms such as the Ruger 10/22, AR-15 rimfire conversions, .22 handguns, and dedicated .22 rifles. The site also covers related calibers and models, including .17 HMR and .22 WMR firearms.

Rimfire World’s articles highlight components and products from manufacturers such as KIDD, CMMG, Volquartsen, MDT, and others. Topics include conversion kits, barrels and bolts, triggers, stocks, chassis systems, scopes, and accessories. Featured examples range from AR-15 conversion components and rimfire rifle actions to 10/22 upgrades and precision-oriented chassis systems. The site organizes material into sections for rifles, handguns, projects, tools, ammunition, and reference information, and provides a forum, question-and-contact options, and links to additional content. By bringing product details and rimfire-focused coverage together, Rimfire World helps readers explore equipment choices and learn about builds suited to their interests.