Aero Precision EPC Lower Parts Kit - No FCG/Grip

Manufactured by Aero Precision
SKU: APRH101330
MPN: APRH101330
Manufactured by Aero Precision
15 Reviews

Out of Stock

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The Aero Precision EPC Lower Parts Kit provides quality parts needed to assemble an EPC lower receiver. These high-quality parts are the same pre-installed proprietary parts from the factory. This EPC Lower Parts Kit comes with just the parts needed to finish an EPC lower and includes a 4-40 set screw for use with the threaded takedown pin detent hole present on most Aero Precision lowers. This kit does NOT include a fire control group, pistol grip, or trigger guard.

Note: Fire control group, pistol grip, magazine catch, magazine catch spring, magazine catch button, and trigger guard NOT included.

  • Takedown/pivot spring
  • Takedown/pivot detents
  • Takedown pin
  • Pivot pin
  • Bolt catch
  • Bolt catch spring
  • Bolt catch buffer
  • Safety selector
  • Safety selector spring
  • Safety selector detent
  • 4-40 set screw - for threaded takedown pin detent hole
  • Buffer retainer
  • Buffer retainer spring

Aero Precision takes some of the most state-of-the-art manufacturing techniques and equipment derived from their work in the aerospace industry and applies it to their products in the firearms industry. They have utilized their knowledge from years of building aircraft components to design and engineer AR-15 handguards, receiver sets, scope mounts, and more. They treat every product as if it were a precision flying machine and adhere to strict quality standards to ensure law enforcement, military, and civilian customers receive a product they can rely on.
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BrandAero Precision
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Great kit

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Perfect if you are building a AR9 not all the extra parts you don’t need

Doesn't include important pieces

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Doesn't include the roll pin for bolt catch or mag release assembly. To be fair they aren't listed.

Quality but....


The quality of the parts seems significantly better than some of the other lower parts kits I've used. Finish on the bolt catch and safety selector are definitely better then most. Only annoying thing was my kit was missing the bolt catch plunger and instead had two safety selector detents.

FCG is not all that is missing here

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Who sells a LPK w/o a magazine release? Aero does. The rest of the stuff was great, but be forewarned you have to buy more parts.

No Mag Release

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Warning! Note that a magazine release is not included! Why?? Everything fit fine in the M4E1 lower receiver. I used an alternate Ambidextrous Safety not the one supplied in this kit.


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Well-made parts, good fit. Installed into a 17Design billet lower without any issues.

***Kit does not include magazine release assembly, order separately***

Could be better if wasn't missing parts

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Aero's quality control in the packaging dept needs an overhaul.
missing a few significant small pieces

Pro - it came with two bolt catches

Con - missing bolt catch buffer
Con - missing safety selector detent
Con - while it's not listed here or even on the box, it would be nice to have the bolt catch roll pin. which is listed on the included parts on Aero's site for this SKU: APRH101330

Just what I needed

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Just what I needed to finish of my lower.

Perfect fit and operation…but be aware of this:

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EPC9 got fitted perfectly with no leftover parts!
FYI: I used a Colt M4 trigger FCU and found it has has a shorter length hammer than a regular milspec hammer and would not reset properly with the Aero 9mm bolt. So I replaced it with a regular S&W Milspec FCU and it worked perfectly. I always thought they were all the same dimensions… But it tain’t so!
Read and heed the Aero bolt box warning label!

Typical Aero trash

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As usual from Aero, over promised and under delivered. Lower parts kits missing mag release, mag release button and spring. These are NOT complete less FCG. I’m done with anything Aero