Aero Precision M4E1 Stripped AR15 LOWER Receiver + Assembled M4E1 UPPER Receiver COMBO:
FREE UPS Shipping to the FREE States only!
The M4E1 Lower Receiver delivers billet aesthetics in a forged package. This custom designed enhanced forging is machined from 7075-T6 Aluminum and compatible with all mil-spec AR15 parts. Aside from the visual upgrades this custom engineered design provides that challenge much more expensive billet options, we have added several functional features to the lower receiver to simplify the assembly process for the at home builder.
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.
- Aero Precision Logo (stamped on both sides of receiver)
- Have pictograms for fire control
- Matte black hard-coat anodized Mil 8625 Type 3 Class 2
- Designated "Cal Multi"
- Semi-auto AR-15 lower receiver
- Works with standard AR15 components and magazines
- Made in Tacoma, WA USA by Aero Precision
The M4E1 Threaded Upper Receiver features a new angular machined design that helps it stand apart from standard mil-spec upper receivers. This upper receiver features the same enhanced body profile as our M4E1 Enhanced Upper Receiver but is threaded to accept a standard AR15 barrel nut. It is forged from 7075-T6 Aluminum, precision machined to work with all mil-spec AR15 parts and includes the port door and forward assist pre-installed.
- New enhanced forging that gives the upper receiver a "billet look"
- New picatinny profile that blends seamlessly with our Enhanced and ATLAS Series Handguards
- M4 Feedramps
- .250 takedown pin holes
- Laser engraved T-marks
- Includes threaded forward assist roll pin
- Includes port door and forward assist
- M4E1 Threaded Upper Receiver in Anodized Black
- Port Door and Forward Assist installed
*Firearm Purchases: No AR lower purchases available for sale in CA, CT, MA, NJ, NY. No exceptions. NOTE California: When we moved from WA to MT we had to get a new FFL as well as a new CA DOJ license/number which we have yet to do, so we cannot ship any firearms into the state of California.
NOTE: Clock starts once we have both your firearm order AND your FFL. Once we have both, your order will process and ship within the following week.
Check your state and local laws for any regulations that may apply. By purchasing a firearm from Surplusammo.com, you agree that you are legally allowed to do so. Per federal law, you must be 21 years or older to purchase firearm receivers/frames & 18 years or older to purchase long guns.
- We SHIP TO VALID FFL's ONLY (Federal Firearm Licensee).
- Find an FFL Dealer Near You (external link, this is NOT a list of FFL's that we have on file)
- Confirm the receiving FFL will accept a transfer from Surplus Ammo for the applicable firearm.
- ***NOTE: This is not a "long gun." This cannot be transferred to you if you are not a resident of the same state as your provided dealer/FFL. Unless you state in your order that your residency is different than your billing address (and we will require a copy of your state ID), any order with billing in one state, and the FFL in another will be canceled.
- It is the customer's responsibility to coordinate arrangements for the receiving FFL to send a valid, signed copy of their FFL to Surplus Ammo. Please include the business or trade name as it appears on the FFL license, city & state of FFL in the "COMMENTS" section of your order for our reference & faster processing.
- Fax: 406-642-3513
- E-mail: Surplusammosales@gmail.com
- If we have shipped to your FFL in the past, please enter "FFL s/b on file" with the FFL's trade name as listed on the license in the "COMMENTS" section of your order (FFL on file must be still current & valid).
- Your order cannot be processed and will be retained until ALL required documents are submitted to and received by Surplus Ammo.
- For safety reasons, we DO NOT ACCEPT RETURNS ON FIREARMS, thus all firearms sales are final.
- IF you are denied for a background check through a the transferring FFL and the firearm(s) must be returned to the sender, (Surplusammo.com, SAA) you will be assessed a 20% re-stocking & paperwork handling fee plus the cost of shipping upon pending refund.