Building or repairing an AR-15 lower? Shop the EGW Evolved lower parts kit, stainless steel spring replacement kit and individual lower receiver components.
Important kit information: The EGW Evolved kit does not include the fire control group, safety selector, pistol grip or trigger guard. Review the exact included-parts list before ordering.
Shop American-made AR-15 lower parts kits and lower receiver parts from EGW. Choose the complete Evolved builder's kit or purchase individual bolt catches, magazine catches, takedown pins, pivot pins, springs and detents for a new build, repair or upgrade.
Major EGW Evolved components are CNC-machined from solid steel instead of MIM. Key steel parts receive a corrosion-resistant QPQ finish, while the lower receiver springs are manufactured from stainless spring steel.
These parts are intended for AR-15-pattern lower receivers. They should not be assumed to fit AR-10, LR-308 or AR-9 platforms. Always verify the individual product description before ordering.
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An AR-15 lower parts kit contains the small components used inside a lower receiver, but the term “complete lower parts kit” does not mean exactly the same thing from every manufacturer. EGW offers a premium builder's kit containing the core components listed below while allowing you to select your own trigger, safety, grip and trigger guard.
Always use the included-parts list on the individual product page as the final reference.
Any part not specifically identified in the kit's included-parts list must be purchased separately.
Choose the EGW Evolved AR-15 lower parts kit when you need the core bolt catch, magazine catch, buffer retainer, receiver pins, springs and detents.
Choose the stainless steel lower spring replacement kit when you want to replace aging or corroded receiver springs without purchasing all the machined components again.
Shop individual lower receiver parts when you need a specific bolt catch, magazine catch, pivot pin, takedown pin, spring, plunger or detent.
Small lower receiver components perform critical jobs. EGW developed the Evolved line for builders who want precisely manufactured parts instead of treating the lower parts kit as an afterthought.
A lower parts kit, often abbreviated LPK, is a collection of pins, catches, springs, detents and other components used inside an AR-15 lower receiver. Included components vary by manufacturer.
It is a builder-focused kit containing the exact core parts listed on its product page. It does not contain every component required to finish an entire lower receiver.
No. The fire control group, including the trigger, hammer and disconnector, is not included. This allows the builder to select a preferred aftermarket trigger.
No. The safety selector, pistol grip, grip hardware and trigger guard must be selected separately.
No. The EGW Evolved kit is designed for AR-15-pattern lower receivers. AR-10, LR-308 and AR-9 platforms require components made for their particular receiver system.
Yes. EGW offers individual bolt catches, magazine catches, receiver pins, springs, plungers and detents for targeted repairs, replacements and upgrades.
It provides replacement stainless steel lower receiver springs without requiring you to repurchase the complete set of machined catches, pins and retainers.
Receiver and aftermarket-component tolerances can vary. Minor fitment may be required. Inspect all parts for proper movement and engagement, and consult a qualified gunsmith if you are uncertain about installation or function.
Choose the complete EGW builder's kit, replace individual lower receiver components or learn more about selecting an AR-15 lower parts kit.
