M4E1 Lower Receiver Improvements:
- Threaded Bolt Catch Roll Pin - Allows for simple installation of the bolt catch and virtually eliminates the chance to damage the finish during installation (pin included). 1/16" Hex Key required for assembly.
- Integrated Trigger Guard - Eliminates the possibility of breaking the trigger guard tabs by integrating the trigger guard into the lower, creating a stronger more rigid platform to build upon.
- Upper Tension Screw - Allows users to fine tune the fit of the upper and lower receiver using a nylon tipped tensioning set screw inserted in the grip tang of the lower receiver. This provides a tight fit with any standard AR15 upper receiver.
- Threaded Takedown Pin Detent Recess - Allows user to easily install the Takedown Pin detent and spring with the use of a 4-40 set screw (no more launching detents across the room).
- Increased Magwell Flare - Increased the flare of the magwell to aid in quick and efficient magazine changes.
- Marked and milled to accept short-throw safety selectors, but will work with standard selectors as well.
Order Details
- Not available where prohibited by law
- Offer not available in all states
- All web sales must go through a Federal Firearms Licensee
- Your order confirmation will contain information on how to submit your qualification credentials and FFLs information
- Coupon codes/Discount codes not applicable
- Please check out the Individual Firearms Sales page for more details on the ordering process.
| Made In America? | | Yes |
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| Platform | | AR15 |
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| Material | | Machined from 7075-T6 forged aluminum |
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| Select Your Finish | | Magpul FDE Cerakote |
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| Markings | | "Cal Multi", "M4-" Serial Number Designation |
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| Compatibility | | Works with standard AR15 components and magazines |
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| Weight(s) | | 8.61 oz |
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| Other | | Rear takedown pin detent hole is threaded for a 4-40 set screw. Threaded Bolt Catch Roll Pin (Included). |
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1 MILLED & MARKED
For standard and short throw safety selectors
2 THREADED BOLT CATCH
Eliminates the chance to mar your receivers finish when installing your bolt catch
3 FLARED MAGWELL
Aids in quick and efficient magazine changes
4 INTEGRATED TRIGGER GUARD
Streamlining the assembly process and providing a more rugged platform
5 UPPER TENSION SET SCREW
Allows users to fine tune the fit between upper and lower receivers
6 THREADED TAKEDOWN PIN DETENT CHANNEL
Eases receiver extension installation by capturing the spring detent with a 4-40 set screw