Your Browser is OutdatedAR15 Parts & Accessories - Upper Receivers, Handguards, Charging Handles & Other AR Parts — 7,244 products / 16,988 models — Page 1
Shop online for great deals on AR15 parts and accessories including complete AR15 uppers and upper parts, such as charging handles, bolt carrier groups, and adjustable gas blocks. We also carry several AR15 lower receiver parts like safety selector switches, AR triggers, bolt catches, and more. Increase your firepower and fun at the range with a forced reset trigger (FRT) for your AR15, find the best AR10 upper to boost your build, and expand your potential with our vast selection of AR15 accessories. Whether you're looking to upgrade an AR15, AR10, or AR9, we have high-quality components to help you enhance your firearm or build one from the bottom up. 
Are All AR Parts the Same?
Most AR parts are interchangeable, especially if they are both labeled as Mil-Spec. The wealth of customization options is one of the reasons AR 15s are so popular. For AR15 barrels, you need to ensure the caliber of the barrel matches the caliber of your other parts.
What Are the Most Important Parts of an AR-15?
All parts of an AR are equally essential to the function of the firearm. Some examples of important AR15 parts include:
- AR15 Upper Receivers
- AR15 Handguards
- AR15 Stocks
- Bolt Carrier Groups (BCG)
- AR15 Barrels & Muzzle Devices
- AR15 Triggers & Trigger Guard
- Buffer Tubes & Kits
- AR15 Gas Blocks & Tubes
- AR15 Pistol Grips
- Dust Cover
- Charging Handles
- Forward Assist
What Parts Wear Out the Fastest on an AR-15?
While AR parts are durable, they do experience a lot of wear and tear if you shoot regularly. This can result in some malfunctions and issues with the more sensitive and most used parts, so knowing what to look out for can help you prepare by getting some backup AR parts in case you need them. Generally, the components that wear out first are the extractor, ejector, and gas rings. The extractor and ejector are responsible for removing spent cartridges from the chamber and ejecting them from the firearm, which involves a lot of friction and heat. The gas rings work with the gas block to direct the gases from a fired round into the gas tube, which is extremely hot, causing the rings to wear down faster.
Buy AR Parts & Accessories at OpticsPlanet
Browse our selection of gun parts to save big on M-LOK handguards, AR pistol braces, lower parts kits, and tons of other premium gun gear for your rifle. Shop for BCM AR15 parts, Daniel Defense AR15 parts, and other high-quality AR parts from top brands in the industry. Also, check out our AR15 How-to Guides for more information on how to select a folding stock adapter, AR trigger, and other essential AR parts. Upgrade your build today and get Free Shipping on most orders over $49.
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Breek Arms Sledgehammer AR-15 Ambidextrous Charging Handle
List: $79.99
(Save 13%)
$69.99
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