Everything You Need for Your AR-15 Upper Build

When building or repairing your AR-15, having a quality AR-15 Upper Parts Kit is essential.
From dust covers to forward assists, springs to pins, these small components ensure your rifle runs reliably and looks clean and professional.

At Mounts Plus, we offer a complete selection of mil-spec and enhanced AR-15 upper parts kits — trusted by gunsmiths, competitive shooters, and hobbyists across the country. Whether you're refreshing an existing build or assembling a new upper, our kits contain everything you need for a flawless install.

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What is Included in an AR-15 Upper Parts Kit?

A standard AR-15 Upper Parts Kit typically includes:

• Ejection Port Cover (Dust Cover)
  ➔ Protects the chamber from dirt and debris.

• Forward Assist Assembly
  ➔ Assists bolt closure during malfunctions.

• Ejection Port Cover Spring and Pin

• Forward Assist Spring, Pin, and Roll Pin

• Miscellaneous Detents and Small Pins

Premium kits may also include enhanced coatings, lightweight components, or custom anodized finishes.

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Why Choose an Upper Parts Kit from Mounts Plus?

• Mil-Spec and Enhanced Kits Available
  Whether you want classic mil-spec durability or upgraded components, we’ve got the right kit.

• Top-Tier Brands
  Shop trusted names like Timber Creek Outdoors and ERGO, known for quality and precision.

• Fast Shipping Across the U.S.
  Get your parts fast so you can finish your build without delay.

• Expert Support
  Our experienced team can help you choose the right kit for your specific upper receiver.

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Our Best AR-15 Upper Parts Kits

Timber Creek Outdoors AR-15 Upper Parts Kit

• CNC-machined aluminum components

• Available in anodized color finishes

• Forward assist, dust cover, and installation hardware included

• Enhanced durability for tactical and competition builds

ERGO AR-15 Upper Spring Replacement Kit

• Ideal for maintenance and repairs

• Includes essential springs and detents

• Designed for easy drop-in installation

ERGO AR-15 Complete Upper Parts Kit

• Comprehensive kit for building or rebuilding an AR-15 upper

• High-quality mil-spec parts

• Forward assist, dust cover assembly, and all necessary springs and pins

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FAQs About AR-15 Upper Parts Kits

What tools do I need to install an AR-15 Upper Parts Kit?

You’ll need basic AR-15 armorers tools, including a small hammer, roll pin punches, and possibly a bench block for easier pin installation.

Are AR-15 Upper Parts Kits universal?

Most upper parts kits are designed to fit standard mil-spec AR-15 upper receivers. Some billet uppers may require slight modifications.

Can I upgrade individual parts of an Upper Parts Kit?

Absolutely! Many builders choose enhanced dust covers, lightweight forward assists, or anti-corrosion coated springs for performance upgrades.

Do I need an Upper Parts Kit if I’m buying a complete upper?

If you’re purchasing a fully assembled complete upper receiver, it will already include these parts. Kits are needed when building from stripped uppers or refreshing old parts.

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Shop Premium AR-15 Upper Parts Kits at Mounts Plus

Whether you're finishing your first AR-15 build or upgrading an existing rifle, our premium AR-15 Upper Parts Kits deliver the reliability, quality, and performance you expect.