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AR Parts Kits

At 3CR Tactical, we offer a wide selection of AR parts kits to help you build, upgrade, or maintain your AR-15 platform. Whether you’re a first-time builder or an experienced firearm enthusiast, our high-quality parts kits provide everything you need to customize your rifle to your exact specifications. From lower parts kits to complete build kits, we’ve got you covered.

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AR Parts Kit for Customizing Your Rifle

Looking to customize your AR rifle with precision and reliability? At 3CR Tactical, we provide high-quality AR parts kits to suit every need, whether you're upgrading, repairing, or building from scratch. With free shipping on all orders, our kits make it easier than ever to enhance your AR-9, AR-10, or AR-15. Explore our extensive selection and see why our customers trust us for their firearm projects.

Why Customers Choose AR Parts Kits from 3CR Tactical

When it comes to building or upgrading your AR rifle, the right parts make all the difference. Our AR parts kits are designed with durability, precision, and compatibility in mind. Whether you're a seasoned gunsmith or a first-time builder, you can count on our products to deliver consistent performance. By choosing the right AR lower parts kit, you’re taking a critical step toward completing your project with confidence and efficiency.

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Lower Parts Kits for AR-9, AR-10, and AR-15

Our lower parts kits include everything you need to assemble or refurbish your rifle’s lower receiver. From triggers and hammers to safety selectors and springs, these comprehensive kits ensure your firearm functions smoothly. With 3CR Tactical, you’ll find options tailored to AR-9, AR-10, and AR-15 platforms, making it easy to find the perfect fit for your build. Before proceeding with your purchase, you can review the included components to verify they meet your specific needs.

Upper Parts Kits: Precision and Functionality

An upper receiver is only as good as the parts you use to assemble it. That’s why we offer premium upper parts kits, featuring components like ejection port covers and forward assist assemblies. Designed to meet or exceed mil-spec standards, these kits are perfect for replacing worn-out parts or completing your upper receiver build. Ensuring your rifle is secure and reliable should always be a priority.

Build Kits: Everything You Need in One Package

Our build kits provide a complete solution for constructing your dream AR. These kits include critical components such as the upper receiver, lower parts kit, barrel, handguard, and bolt carrier group. The only thing you’ll need is a stripped lower receiver. With our kits, you can craft a rifle that’s tailored to your preferences without hunting for individual parts. This all-in-one approach simplifies the building process and strengthens your human connection to your custom firearm.

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Bolt Carrier Group (BCG) AR Parts Kits for Peak Performance

The bolt carrier group (BCG) is the heart of any AR rifle, and our BCG parts kits ensure it runs like a well-oiled machine. These kits come with all the essential components, including the bolt, firing pin, cam pin, and extractor. Whether you’re replacing worn parts or assembling a new BCG, you can rely on our kits to deliver flawless performance. Review the options carefully to verify compatibility with your specific model before proceeding.

Trigger Upgrade AR Parts Kits for a Superior Shooting Experience

If you’re looking to improve your shooting accuracy and feel, our trigger upgrade kits are the way to go. These kits feature precision-machined triggers and hammers that deliver a crisp, clean break. Upgrading your trigger not only enhances performance but also adds a personal touch to your rifle. Taking this action can elevate your shooting experience to the next level.

Safety Selector AR Parts Kits for Customized Control

Safety is paramount, and our safety selector kits allow you to install or upgrade your firearm’s safety mechanism with ease. With options for ambidextrous configurations, these kits provide enhanced usability and flexibility, ensuring you maintain control no matter the situation. Ensuring your rifle is equipped with reliable safety components is a key step in maintaining security and confidence during use.

Takedown/Pivot Pin AR Kits for Easy Maintenance

Every AR owner knows the importance of takedown and pivot pins in keeping the upper and lower receivers securely connected. Our takedown/pivot pin kits include durable pins, detents, and springs, ensuring a snug fit and reliable performance. By responding to wear and tear with high-quality replacement parts, you can maintain the integrity of your rifle for years to come.

Buffer Tube and Stock Kits for Comfort and Stability

The recoil system is a critical component of any AR build, and our buffer tube and stock kits deliver everything you need for a complete setup. These kits include a buffer tube, buffer spring, buffer, castle nut, end plate, and stock, providing both comfort and stability for your rifle. Whether you’re upgrading your stock or assembling a new build, our kits make the process seamless.

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Gas System AR Parts Kits for Reliable Cycling

The gas system is key to your AR rifle's cycling operation. Our gas system kits feature high-quality gas blocks, gas tubes, and roll pins to ensure reliable performance. With options for different barrel lengths and calibers, we help you optimize your rifle’s functionality. Ensuring proper cycling is a vital step in completing your firearm build successfully.

Miscellaneous Small Parts Kits for Every AR Build

Don’t let missing small parts derail your project. Our miscellaneous small parts kits include essential items like detents, springs, and roll pins, ensuring you have all the components needed for a successful build or repair. Even the smallest parts can make a big difference in your rifle’s operation, so take the time to review and verify what you need before ordering.

Why AR Owners Trust 3CR Tactical

At 3CR Tactical, we’re more than just a supplier—we’re firearm enthusiasts who understand the needs of AR owners. Every product we sell is rigorously tested for quality and compatibility, so you can trust that you’re getting the best. Plus, with free shipping on every order, you’ll enjoy unbeatable value with every purchase. By choosing 3CR Tactical, you’re taking action toward ensuring the highest standards for your AR build.

Start Your AR Build Today

Whether you’re building your first AR rifle or upgrading your current setup, 3CR Tactical has the AR parts kits you need to get the job done. Browse our selection today and take the first step toward a customized, high-performance firearm. Proceed with confidence, knowing you’ve chosen a trusted partner in AR components.

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