EGW Evolved AR-15 Lower Parts Kit | Machined Lower Receiver Components

The EGW Evolved AR-15 Lower Parts Kit provides a premium foundation for a new lower receiver build, repair or component upgrade. Instead of treating the smallest receiver parts as an afterthought, EGW developed the Evolved line around precision machining, durable materials and corrosion-resistant finishes.

Major components such as the bolt catch, magazine catch, magazine catch button, pivot pin and takedown pin are CNC-machined from solid steel instead of MIM. Applicable steel parts receive a QPQ finish for surface hardness, lubricity and corrosion resistance.

The included lower receiver springs are manufactured from stainless spring steel to help resist corrosion and maintain dependable spring tension. Every component in the kit is proudly made in the USA.

Looking for individual components? Shop all AR-15 lower parts kits and lower receiver parts.

Included Lower Receiver Parts

• Bolt Catch
• Bolt Catch Plunger
• Bolt Catch Roll Pin
• Bolt Catch Spring
• Buffer Retainer
• Buffer Retainer Spring
• Magazine Catch
• Magazine Catch Button
• Magazine Catch Spring
• Front Pivot Pin
• Rear Takedown Pin
• (2) Takedown / Pivot Pin Detents
• (2) Takedown / Pivot Pin Detent Springs

Parts Not Included

• Trigger
• Hammer
• Disconnector
• Safety Selector
• Pistol Grip
• Pistol Grip Screw and Washer
• Trigger Guard
• Receiver Extension or Buffer Tube
• Buffer and Recoil Spring
• Stock or Brace
• Any component not specifically identified in the included-parts list

Why Choose the EGW Evolved AR-15 Lower Parts Kit?

• ✔ Major components CNC-machined from solid steel instead of MIM
• ✔ QPQ finish on applicable steel components
• ✔ Stainless steel lower receiver springs
• ✔ Builder-focused configuration without an unwanted trigger or grip
• ✔ Individual replacement components available separately
• ✔ Designed for AR-15-pattern lower receivers
• ✔ Proudly made in the USA

Installation & Fitment Notes

• Confirm that your receiver uses the standard AR-15 lower receiver pattern.
• Do not assume compatibility with AR-10, LR-308, AR-9 or proprietary receiver systems.
• Inspect each component and receiver interface before assembly.
• Minor fitment may be required due to receiver and component tolerances.
• Verify that all installed controls move freely and engage positively.
• Use appropriate protective equipment when working with springs and detents.
• Consult a qualified gunsmith if you are uncertain about installation, fitment or function.

Replacement Springs & Individual Parts

If you do not need the complete builder's kit, EGW also offers an AR-15 lower spring replacement kit and individual catches, pins, springs, plungers, retainers and detents.

For additional information about choosing an LPK, read the EGW AR-15 lower parts kit guide.

Modification of your firearm may nullify the manufacturer's warranty.
This product should be installed and checked by a qualified gunsmith.
No liability is expressed or implied for damage or injury which may result from improper installation or use of this product.

Alt Description:

• AR-15 lower parts kit
• Premium AR lower parts kit
• USA-made AR-15 LPK
• Machined AR-15 lower receiver parts
• EGW Evolved lower parts kit