Free Shipping

Enter your email to be notified when this product is back in stock:

Submit Close

Enter your email to be notified when this product is back in stock:
Submit Close

Aero Precision M5E1 AR-10 Upper Receiver + 15" Free Float Rail Combo Set

The state of the art M5E1 platform starts with the M5E1 Upper Receiver. The M5E1 upper receiver is a one-piece design combining the handguard mounting platform with the upper itself. Since the rail mounting surface and upper are of the same forging, not only is it a stronger system, but it also provides for easy installation of the gas tube with a pre-aligned gas tube hole. Additional lightening cuts save weight and allow for more efficient cooling.

Easy barrel installation - Simply insert your barrel assembly into the M5E1 upper and tighten it using the provided barrel nut and wrench. Then slide your rail on and tighten the screws. Within minutes you have a modular, free-floated rail.

The state-of-the-art Enhanced Upper Receiver combines the handguard mounting platform with the upper itself, condensing the parts needed to mount a free-floated handguard to a mere 8 screws. Our Gen 2 proprietary handguards are designed specifically for our Enhanced Series Upper Receiver and are meant to be purchased together.


  • M5E1 Enhanced Upper Receiver
  • M5 Gen 2 Enhanced Handguard of choice
  • Handguard mounting screws
  • Barrel Nut

M5E1 Upper Features:

  • Forged from 7075 T6 aluminum
  • Precision machined to our specs
  • M4 feedramps
  • Laser engraved T-marks (Anodized only)
  • .2795” takedown pin holes
  • Accepts standard DPMS .308 components
  • Comes with forward assist and port door installed
  • Handguard mounting platform is forged into the receiver

NEW Gen 2 Enhanced Handguard Features:

  • Added quick disconnect sling socket at the 3, 6 and 9 o’clock positions
  • Milled additional surfaces along flats to aid with gripping and add visual appeal
  • New profile of the Picatinny Top Rail
  • 1pc free float design
  • Rail is Machined from 6061-T6 Aluminum
  • Built in Anti-Rotation tabs
  • Scalloped rails
  • Continuous top rail
  • 1.72" inside diameter fits most muzzle devices and 1.5" suppressors
  • Compatible with low profile gas blocks

Torque to 65 ft. lbs. with a standard AR15 Armorer’s Wrench

Paypal is disabled for this item. 

Just What I wanted


Great product. Very fast email response, good shipping, great price. Will shop here again and recommend them.


Excellent company, fast shipping and excellent price. I took a chance and boy am I glad I did. Aeroprecision stuff has excellent machine quality and fit.


Very impressed with the fit and quality. Excellent value. I wish Tom's Tactical offered an FDE MLOK 15" version.

Uses a standard AR15 barrel nut wrench (does not come with one)
(its hard to tell by the photo.. but the barrel-nut-looking is forged as part of the upper receiver. The actual barrel nut screws into that piece and is tightened using an AR-15 wrench

You WILL need a Torx T15 driver to tighted the hand-guard screws. (don't use the crappy harbor freight ones...they will break)

Rail is rather wide.


110% satisfied with this upper and rail! I was skeptical at first because of the price but man so glad I took a chance. Toms shipped my order the day after I placed it and it arrived 2 days later priority mail. Upper came boxed and unblemished and the rail was double wrapped and looked great! Looking forward to finishing my build and ordering a bcg and barrel from toms tactical.


Write a review

    Low           High

Aero Precision M5E1 AR-10 308 Upper Receiver + 15" Free Float Rail - Gen 2

  • Brand: Aero Precision
  • Product Code: APAR308554
  • Availability: In Stock
  • $337.50
  • $258.95
  • Free Shipping

Available Options

Related Products


Toms Tactical Black Nitride 308 Bolt Carrier Group BCG

Toms Tactical Black Nitride 308 Bolt Carrier Group BCG

11 Review(s)

$149.95 $159.95

Free Shipping

Aero Precision M5E1 AR-10 308  Upper Receiver + 15" Free Float Rail - Gen 2
Aero Precision M5E1 AR-10 18" .308 CMV Upper Receiver Assembly