Aero Precision AR15 Standard Lower Parts Kit
$91.54
Mil-spec AR15 lower parts kit for building a custom rifle. Includes all necessary components for reliable operation.
Out of stock
Our lower parts kit helps you to build a custom AR15 from the ground up. Mil-spec dimensions and coating ensure the highest quality and correct component interface.
Includes:
- Takedown/pivot Spring
- Takedown/pivot detent
- Trigger/hammer pin
- Takedown pin
- Pivot pin
- Bolt Catch
- Bolt Catch Spring
- Bolt Catch buffer
- Bolt catch roll pin
- Safety Selector
- Safety Selector spring
- Safety Selector detent
- 4-40 Set Screw (for threaded takedown pin detent hole)
- Buffer retainer
- Buffer retainer spring
- Trigger guard
- Trigger guard roll pin
- A2 pistol grip
- Pistol grip screw
- Pistol grip lock washer
- Trigger spring
- Hammer spring
- Disconnector spring
- Magazine catch body
- Magazine catch spring
- Magazine catch button
- Hammer
- Trigger
- Disconnector
| Weight | 0.520 lbs |
|---|---|
| Dimensions | 6.500 × 3.350 × 0.800 in |
| Manufacturer | Aero Precision |
| Finish | Coating |
| Material | Mil-spec |
| Compatible With | AR15 |
PROCESSING & SHIPPING
Orders typically ship within 1–3 business days (Monday–Friday) after payment and all required documentation are received. Time to arrival after shipment depends on the carrier. Shipping method is at BT Gun Company’s discretion; ammunition and oversized accessories are charged at actual shipping cost. We do not ship to Hawaii or Alaska.
FIREARM TRANSFERS
- Firearms must ship to a licensed FFL dealer of your choosing — confirm with them first that they can accept the transfer.
- Your receiving FFL will need to email their license to [email protected] before we can ship.
- Inspect your firearm at your FFL’s location before signing ATF Form 4473 — once signed, the firearm is considered accepted.
You’re responsible for knowing the firearms laws in your state before ordering. For complete shipping, returns, and restocking-fee policy details, see our Shipping & Returns page.

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