AR-15 Parts & Accessories

Whether you're building your first rifle, upgrading an existing firearm, or replacing worn components, having the right AR-15 parts and accessories makes all the difference in reliability, accuracy, and overall performance. The AR-15 platform is renowned for its unmatched modularity, allowing shooters to customize virtually every component to fit their specific needs. From precision competition rifles and hunting builds to duty carbines and home-defense firearms, quality parts are the foundation of a dependable AR-15.

At Ballistic Barn, we carry a wide selection of premium AR-15 parts and accessories, including upper receiver parts, lower receiver parts, bolt carrier groups, charging handles, barrels, gas system components, handguards, muzzle devices, triggers, stocks, buffer systems, optics mounts, and much more. Browse the categories below to find the components you need to complete your next build or upgrade your current rifle.

High-Quality AR-15 Components Built for Performance & Reliability

Every part on an AR-15 plays an important role in how the rifle functions, feels, and performs. Whether you're replacing factory components, improving reliability, reducing weight, or increasing accuracy, investing in quality parts ensures your rifle performs when it matters most. We carefully select products from trusted manufacturers known for producing durable, American-made components that meet the demands of serious shooters.

Our inventory includes virtually every major component needed to build, repair, or upgrade an AR-15, including:

Upper Receiver Parts

AR-15 Handguards available in multiple lengths, attachment systems, finishes, and Cerakote colors.
AR-15 Barrels offered in numerous calibers, barrel lengths, twist rates, and gas system configurations.
Upper Receivers for complete custom builds with multiple finish and Cerakote options.
Bolt Carrier Groups (BCGs) in popular calibers with phosphate, nitride, DLC, and other premium finishes.
Charging Handles ranging from mil-spec models to oversized ambidextrous tactical designs.
Muzzle Devices including flash hiders, muzzle brakes, compensators, linear compensators, and suppressor-ready options.
Gas Blocks & Gas Tubes featuring low-profile, adjustable, and multiple diameter configurations.

Lower Receiver Parts

Lower Receivers ready to complete your custom AR-15 build.
Lower Parts Kits (LPKs), springs, pins, detents, magazine catches, bolt catches, and ambidextrous safety selectors.
Performance Triggers from trusted manufacturers including LaRue, Geissele, TriggerTech, and other industry-leading brands.
Buffer Systems & Stocks including complete buffer kits, receiver extensions, buffers, springs, braces, and adjustable stocks.

Why Buy AR-15 Parts & Accessories From Ballistic Barn?

At Ballistic Barn, we understand that quality components are the key to a reliable rifle. That's why we focus on offering parts and accessories that deliver dependable performance, proper fitment, and long-term durability. Our product selection is constantly expanding to include the latest innovations and proven components trusted by hunters, competitive shooters, tactical professionals, and recreational enthusiasts alike.

Whether you're replacing a single component or building an AR-15 from the ground up, our extensive selection of AR-15 parts and accessories makes it easy to find exactly what you need. Explore the categories below to shop premium parts, upgrade your rifle with confidence, and build an AR-15 that's ready for the range, the field, or wherever your next adventure takes you.