Furthermore, the Aero Precision M4E1 16″ 5.56 Complete Rifle is built on our popular Enhanced Series Upper Receiver. Also, this system features a custom integrated upper receiver and handguard platform that provides the shooter a light-weight, free-floated, rigid design resulting in superior performance and accuracy.

Also, all complete rifles are assembled by our professional gunsmiths and are tested prior to leaving our facility. Moreover, buy with confidence when you purchase an Aero Precision Complete Rifle.

Upper Features:

• Upper: M4E1 Enhanced Upper Receiver
• Barrel: 16″ 5.56, Mid-Length, 1:7 Twist, 4150 Chrome Moly Vanadium, QPQ corrosion resistant finish
• Handguard: Gen 2 Enhanced Series Handguard of choice
• Gas System: Low Profile Gas Block and Mid-Length Gas Tube
• Bolt Carrier Group: M16 Cut, 8620 Steel, Phosphate Finish, Properly Staked
• Muzzle Device: Standard A2 Flash Hider

Lower Features:

• Lower Parts Kit: Enhanced AR15 Lower Parts Kit w/ Billet Trigger Guard
• Buffer Kit: Standard Mil-Spec AR15/M4 Buffer Kit
• Stock: Magpul STR Stock
• Grip: Magpul MOE Grip
• Magazine: Magpul 30 Round PMAG®

Furthermore, the M4E1 Lower Receiver delivers billet aesthetics in a forged package. However, this custom designed enhanced forging is machined from 7075-T6 Aluminum and compatible with all mil-spec AR15 parts. Also, 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.

This lower is amazing! It is soild all round! For the price with the features you get makes this the best around. Also, if you are looking for something quality and makes life easier for you on your build, look no further. However, i will only use these lowers moving forward. Thank you Aero for making such great product at an affordable price! (Hard to find these days)