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Browse our inventory of semi auto rifles from top brands such as Great Lakes, Sig Sauer, Heckler & Koch / H&K, Mauser Rimfire, and Citadel. Iron Hill Armory stocks a dependable lineup of semi auto rifles built for sport shooting, home defense, hunting, and tactical applications, with options to suit shooters of every experience level. Round out your setup with rifle ammunition in a wide range of calibers, plus rifle magazines to keep you loaded for extended range time and gun scopes to dial in accuracy at any distance. We also carry AR rifles, bolt action rifles, and gun parts from a variety of manufacturers to complete your build.
Shop semi auto rifles online by comparing models, checking current availability, and reviewing specifications such as caliber, capacity, barrel length, and sight configuration. Semi auto rifles cycle automatically with each trigger pull, making them a popular choice for sport shooting, hunting, home defense, and tactical training thanks to their fast follow-up shots and wide platform variety.
Here’s what to consider before buying:
Buy semi auto rifles online or visit our gun shop in St. James, Missouri to handle inventory in person before purchasing. Iron Hill Armory also serves customers from nearby cities including Rolla, Cuba, Salem, and Steelville.
All firearm transfers follow federal guidelines and applicable Missouri requirements, which typically involve shipment to a licensed dealer and completion of a background check prior to pickup. Shipping timelines and transfer steps can vary by product, so review checkout information carefully before placing your order.
Carry methods, transportation practices, and storage responsibilities may differ based on circumstances. Contact the shop directly for clarification on transfer procedures, accepted identification, and current store policies.
A semi auto rifle fires one round per trigger pull and automatically cycles the next round into the chamber. It does not fire continuously like a fully automatic firearm.
5.56 NATO, .223 Remington, 7.62×39, and .308 Winchester are among the most common chamberings. The right choice depends on your intended use and ammunition availability.
Yes, semi auto rifles work well for hunting when chambered in appropriate calibers and paired with quality ammunition. Always check your state’s hunting regulations for caliber and capacity rules.
Clean your rifle after each range session or hunting trip to prevent carbon buildup and maintain reliable cycling. Pay extra attention to the bolt, gas system, and chamber.
Direct impingement uses gas routed back into the bolt carrier to cycle the action, while piston systems use a separate rod. Piston designs run cooler and cleaner, while direct impingement tends to be lighter and more accurate.
Magazines must match your specific rifle platform and caliber. Even similar looking magazines may not be interchangeable across different rifle models.
Many semi auto rifles run more reliably after the first few hundred rounds as parts settle in. Check the manufacturer’s documentation for specific break-in recommendations.
Yes, semi auto rifles can work well for new shooters when paired with proper instruction and a manageable caliber. Taking a basic rifle course before regular use is strongly recommended.
