M5E1 Builder Sets

$539.99 - $614.99
Out of stock
This is an FFL item. Please read our Terms and Conditions


This is a controlled item and requires shipping to an authorized and valid Federal Firearms License (FFL) holder. All items placed on order with this item will be shipped together to the FFL. If you are ordering non-FFL items that you would like shipped directly to you, please place them on a separate order.

If you have a copy of the FFL, please email it to ffl@aeroprecisionusa.com

If you do not have a copy of the FFL but you do have the dealer's email address, please add it in the comments field at checkout. It may help us acquire a copy of the FFL and get your order shipped out more quickly.

There will be a 30% restocking fee for all controlled items returned due to a failed background check or a denied underage purchase.

Federal law requires that you be 21 years of age or older to purchase a stripped receiver or frame. If a frame or receiver can only be made into a long gun (rifle or shotgun), it is still a frame or receiver not a handgun or long gun. However, they still are "firearms" by definition, and subject to the same GCA limitations as any other firearms. See Section 921(a)(3)(b). 18 U.S.C. Section 922(b)(1) makes it unlawful for a licensee to sell any firearm other than a shotgun or rifle to any person under the age of 21.

Save 10% off the combined price when you buy the M5E1 Builder Set! This package deal features the pieces you need to start building your own M5E1 (.308) Rifle, including an M5 Stripped Lower Receiver, M5E1 Upper Receiver and Enhanced Gen 2 Handguard of choice.


  • M5 Stripped Lower Receiver
  • M5E1 Assembled Enhanced Upper Receiver
  • Enhanced Gen 2 Handguard of Choice
  • All 3 pieces are finished in mil-spec Anodized Black or Magpulâ„¢ FDE Cerakote
Shipping to FFL Dealer RequiredYes
Made In America?Yes
Weight(s)KeyMod: 9" - 36.16 oz / 12" - 38.26 oz / 15" - 40.16 oz
M-LOK: 9" - 36.16 oz / 12" - 38.86 oz / 15" - 40.17 oz
Quad Rail: 9" - 37.76 oz / 12" - / 15" -
Other Features-