You’ve got your Aero Precision EPC lower receiver and you’re ready to build. You don’t need another trigger or grip you won’t use. You need the specific small parts to get it done right. This is that kit.

This Aero Precision EPC Lower Parts Kit contains every pin, spring, detent, and the specialized hardware required to assemble your EPC-9, EPC-40, or EPC-45 lower receiver. We’re talking about the correct bolt catch buffer and the 4-40 set screw for the threaded takedown pin detent hole—parts specifically designed for the EPC platform’s reliability with straight-blowback calibers.

Everything here is built to Aero’s solid standards. The safety selector, bolt catch, and all springs are made from quality materials for a precise, durable fit. This kit mates perfectly with any standard AR-15 compatible fire control group and pistol grip of your choice, giving you total control over those critical components.

What You Get – No Surprises

This kit includes all the following:

• Takedown Pin & Pivot Pin
• Takedown/Pivot Pin Springs & Detents
• Bolt Catch Assembly (Catch, Spring, Buffer, Roll Pin)
• Safety Selector, Spring, and Detent
• Buffer Retainer and Spring
• Critical EPC Part: 4-40 Set Screw (for threaded detent hole)

Note: Fire Control Group (hammer, trigger, disconnector) and Pistol Grip are NOT included. This is by design for your custom build.

Built for the EPC. Period.

Don’t try to piece together a standard AR-15 kit and hope it works. The EPC has specific requirements, especially for reliable bolt catch function with pistol-caliber uppers. This kit is engineered from the ground up for the Aero Precision EPC lower receiver. It ensures correct geometry and function, so your final build runs smooth from the first mag to the last.

If you’re assembling an Aero EPC lower, this is the only small parts kit you should consider. It’s the straightforward, no-nonsense solution for builders who know what they need.

Specifications

• Brand: Aero Precision