Image unavailable
Ar-15 M4e1 Lower Bolt Catch Pin - Lower Bolt Catch Pin For Ar-15/M4e1 Stainless Steel
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$8.99
View on Brownells
You'll be taken to Brownells to complete your purchase.
Hunter's Outpost earns a commission from affiliate links at no extra cost to you.
SKU: 100036981
Overview
This threaded roll pin is intended for maintaining an Aero Precision M4E1 lower receiver when the original bolt catch pin has been lost or damaged. It is a replacement part for that specific receiver pattern and is not compatible with the M5 Lower Receiver or AR-15 Gen 2 Lower Receivers. Because it is already included with the M4E1 Lower Receiver, it is best suited as a spare or service replacement rather than a standalone upgrade. Manufactured by Aero Precision, it offers a straightforward way to restore a small but necessary component without changing the receiver’s setup.
Why Hunters Choose the Aero Precision
Aero Precision
M4E1 Lower Receivers
Replacement Lost
Damaged threaded bolt catch pins
Threaded Roll
Pin design matches the M4E1
Made From
Stainless steel
Offered As
Individual replacement part when needed
Key Features
- Threaded roll pin designed for Aero Precision M4E1 Lower Receiver use.
- Not compatible with Aero Precision M5 Lower Receiver or AR-15 Gen 2 Lower Receivers.
- Included with the M4E1 Lower Receiver from the factory.
- Offered as a replacement for lost or damaged M4E1 threaded bolt catch roll pins.
- Manufactured by Aero Precision.
Best Used For
- Replacement part for owners who lost or damaged an M4E1 threaded bolt catch roll pin
- Aero Precision M4E1 Lower Receiver users needing a direct-fit spare component
- Builders maintaining an existing M4E1 lower and replacing a missing included pin
- Users who need a single replacement instead of purchasing a complete lower receiver
Specifications
| Compatibility | Aero Precision M4E1 Lower Receiver |
|---|---|
| Included With M4e1 Lower Receiver | Yes |
| Incompatible With | Aero Precision M5 Lower Receiver; AR-15 Gen 2 Lower Receivers |
| Material | Stainless Steel |
| Replacement Use | For lost or damaged M4E1 threaded bolt catch roll pin |
| Sold Separately | Yes |
| Threaded | Yes |
Pros
- Designed specifically for Aero Precision M4E1 Lower Receivers
- Provides a replacement for lost or damaged threaded bolt catch pins
- Threaded roll pin design matches the M4E1 lower receiver system
- Made from stainless steel
- Offered as an individual replacement part when needed
- Backed by Aero Precision manufacturing
Considerations & Trade-offs
- Designed specifically for Aero Precision M4E1 Lower Receivers, so compatibility is limited and it will not fit M5 Lower Receivers or AR-15 Gen 2 Lower Receivers.
- This is a replacement part rather than an upgrade item; it is intended for users who need to replace a lost or damaged threaded bolt catch roll pin.
- The pin is already included with the M4E1 Lower Receiver, so most buyers will not need to purchase it separately.
- Because it is a small, receiver-specific component, confirming the exact lower receiver model before ordering is important.
Suggested Comparisons
- AR-15 lower receiver parts
- Bolt catch components
- Replacement small parts kits
- Aero Precision M4E1 receiver accessories
Suggested Accessories
- Lower receiver parts
- Replacement pins
- AR-15 assembly hardware
- Small parts kit
Frequently Asked Questions
What receiver is this bolt catch pin made for?
It is designed to work with Aero Precision's M4E1 Lower Receiver.
Will this fit an Aero Precision M5 Lower Receiver or AR-15 Gen 2 Lower Receiver?
No. The source data says it will not work with Aero Precision's M5 Lower Receiver or AR-15 Gen 2 Lower Receivers.
Is this part already included with the M4E1 Lower Receiver?
Yes. The product notes state that it is already included with the Aero Precision M4E1 Lower Receiver and does not need to be purchased separately.
Why would someone buy this part separately?
It is offered for customers who have lost or damaged their existing M4E1 threaded bolt catch roll pin.
Who makes this bolt catch pin?
The manufacturer listed is Aero Precision.