Loading...

Gun Parts

Gun Parts

Browse our inventory of gun parts from trusted brands like Cole-TAC, Briley, BRNO, Alexander Arms, and Amend2. On Target Outdoors carries quality, reliable gun parts built for hobbyist gunsmiths, custom builders, and shooters looking to upgrade, repair, or maintain their firearms. From triggers and barrels to grips, stocks, and small components, we stock a wide range of parts to keep your guns running smoothly and tailored to your preferences. Explore our rifle parts, shotgun parts, and handgun parts to find the right components for your next build or upgrade. Round out your kit with magazines, scopes sights and optics, and ammunition options like rifle ammunition, handgun ammunition, and shotgun shells from our full lineup.

Showing 1–16 of 30 results

Gun Parts Buying Guide

Shop gun parts at On Target Outdoors and find the components you need to maintain, repair, or upgrade your handgun, rifle, or shotgun. Whether you are replacing worn factory parts after a busy Montana hunting season, building out an AR platform, upgrading your carry pistol’s trigger and sights, or sourcing small parts to keep a reliable firearm running at peak performance, our Laurel selection covers the most essential components for the most widely used firearms platforms across the Yellowstone Valley.

Complete your firearm and carry setup with everything On Target Outdoors carries alongside your parts purchase:

  • Guns and firearms: Browse the full On Target Outdoors firearms inventory and find the right handgun, rifle, or shotgun to pair with your parts purchase, whether you are building from the ground up or upgrading an existing platform in your Montana collection.
  • Handguns: Shop the full handgun selection at On Target Outdoors and find the right pistol or revolver to pair with your upgrade components, from carry pistol trigger and sight improvements to full platform builds for Montana constitutional carry use.
  • Magazines: Keep your handguns and rifles properly fed with quality factory and aftermarket magazines in standard capacities for the most popular firearms platforms, a natural companion to any parts and upgrade purchase.
  • Scopes, sights and optics: Pair your parts upgrade with a quality optic, iron sight, or red dot to complete your rifle or handgun build with a sighting solution matched to your specific Montana hunting or defensive application.
  • Holsters and gun leather: Complete your upgraded carry handgun setup with a quality holster that properly secures your pistol for Montana constitutional carry, ensuring consistent draw access and reliable retention through every carry position and outdoor activity.
  • Ammunition: Stock up on the right loads for your newly maintained or upgraded firearms platform, covering defensive hollow points, hunting loads for Montana elk and deer season, and training ammunition for range use.

Local And Compliance Notes

On Target Outdoors is the trusted firearms dealer in Laurel, Montana, and serves customers in the nearby cities of Park City, Joliet, Columbus, and Billings. All firearm purchases at On Target Outdoors are conducted in full compliance with federal and Montana state law, including ATF Form 4473 and a NICS background check for every firearm sale. Montana follows all applicable federal regulations governing the purchase and transfer of firearms and related products.

Most gun parts are unregulated accessories that do not require a background check to purchase, but certain components are legally defined as firearms under federal law and require the same transfer process as a complete firearm. Serialized receivers and frames, including AR-15 lower receivers and pistol frames, require ATF Form 4473 and a NICS background check at the point of purchase. Buyers of serialized components must meet all applicable federal and Montana state eligibility requirements. Montana has constitutional carry, and all completed builds remain subject to all applicable federal and Montana firearms laws regardless of carry permit status.

Montana residents should be aware that assembling certain regulated firearm configurations from parts without prior ATF approval, such as a short-barreled rifle or short-barreled shotgun, is a federal felony regardless of whether the individual parts are legal on their own. Contact On Target Outdoors for guidance on parts compatibility, legal build requirements, and upgrade recommendations for your specific platform before starting any build or modification project in the Laurel and Yellowstone Valley area.

Frequently Asked Questions About Gun Parts

What gun parts does On Target Outdoors carry?

+

On Target Outdoors carries a range of gun parts and upgrade components for popular handgun, rifle, and shotgun platforms. Available items include triggers, barrels, stocks, slides, sights, handguards, and other maintenance and upgrade parts for the most commonly owned firearms in use across Montana. Stop in or check online for current parts inventory and available components for your specific platform.

Do gun parts require a background check in Montana?

+

Most gun parts do not require a background check, as they are unregulated accessories under federal law. However, serialized components legally defined as firearms, including AR-15 lower receivers and pistol frames, require ATF Form 4473 and a NICS background check at the point of sale. Non-serialized parts such as triggers, barrels, handguards, stocks, and slides do not require a background check. Buyers of serialized components must meet all applicable federal and Montana eligibility requirements.

What handgun upgrade parts does On Target Outdoors carry?

+

On Target Outdoors carries handgun upgrade components for popular pistol platforms including triggers, barrels, sights, slides, grips, and internal parts. Quality aftermarket components can meaningfully improve trigger feel, accuracy, and ergonomics for carry, competition, and range use. Whether you are upgrading a Glock, a 1911, or another popular carry pistol platform for everyday carry across Montana, the staff at On Target Outdoors can help you find compatible upgrade components for your specific model.

Can I build my own AR-15 using parts from On Target Outdoors?

+

Yes, provided all components comply with applicable federal and Montana state law. The lower receiver is the serialized component legally defined as the firearm under federal law and requires a background check at the point of purchase. All other components including uppers, barrels, handguards, triggers, and small parts are unregulated accessories. Any completed build must meet all federal requirements, including minimum barrel length to avoid NFA classification as a short-barreled rifle. Contact On Target Outdoors for guidance on legal build requirements before starting your project.

What AR-15 parts are most popular for Montana shooters?

+

The most popular AR-15 upgrade parts among Montana shooters are triggers, handguards, and optics-related components. A quality aftermarket trigger with a lighter, crisper pull reduces shooter-induced movement and improves accuracy for both range training and hunting applications. A free-float handguard eliminates barrel contact for more consistent accuracy and a more comfortable grip surface. Completing the setup with a quality red dot or low-power variable optic for predator hunting across Montana’s open agricultural and river bottom country is the final step toward a fully capable Montana AR build.

What shotgun parts does On Target Outdoors carry?

+

On Target Outdoors carries shotgun parts and accessories for popular pump action and semi-automatic platforms, including choke tubes, replacement stocks, trigger components, and other maintenance and upgrade items. Choke tubes are the most commonly sourced shotgun accessory, as selecting the right constriction for steel waterfowl loads, upland bird hunting, or turkey hunting significantly affects pattern performance at field distances. Contact On Target Outdoors for current shotgun parts inventory and compatibility information for your specific platform.

Are there any gun parts that are illegal to own in Montana?

+

Montana follows federal law on regulated firearm components with no additional state-level restrictions. Parts regulated under the National Firearms Act, including automatic sears and other NFA-controlled items, require ATF registration, a $200 tax stamp, and approval before possession. Assembling an unregistered short-barreled rifle, short-barreled shotgun, or machine gun from otherwise legal parts is a federal felony regardless of whether the individual parts are legal on their own. Contact On Target Outdoors or consult a qualified attorney if you have questions about specific parts or build projects before proceeding.

How do I know which parts are compatible with my firearm?

+

Parts compatibility depends on your specific firearm manufacturer, model, generation, and caliber. For AR-15 and AR-10 platforms, the mil-spec standard covers most lower and upper components, though barrel threading and gas system dimensions must match your specific configuration. For handguns, most aftermarket parts are model-specific and require confirmation of compatibility with your exact pistol variant before purchasing. The staff at On Target Outdoors can help you identify compatible parts and upgrade options for your specific firearm to ensure a correct fit and proper function before you order.

Are you 18+?

You must be 18 or older to enter this site

Yes, I am 18+