Shipping to California
- Status: Complete upper with a barrel. Not a serialized firearm, but we ship it to a licensed dealer only.
- Delivery: Ships to WBT in La Mesa or to the California gun store you choose; select your dealer at checkout. Not shipped to home addresses.
- Learn more: Featureless or fixed magazine: which fits your build · FAQ
About this upper
Aero Precision M4E1 Assembled Upper Receiver 18'' 5.56 Rifle Length is an upper receiver chambered in M4E1 5.56MM Assem Uppr Receiver Govt. Finish: Black.
Manufacturer details
The M4E1 5.56mm 18" Rifle Upper Receiver adds two important benefits to Aero Precision’s M4E1 carbine upper. First, the longer 18" barrel imparts extra velocity to the bullet with a very small addition to the rifle’s OAL. Second, the longer rifle-length gas system slows down gas velocity for gentler cycling that leads to improved reliability and reduced wear on moving parts and the receiver. The result? Rifle-like performance - and versatility - in a carbine-sized package.
The Aero Precision M4E1 5.56mm 18" Rifle Upper Receiver delivers all the other benefits of Aero’s M4E1 receiver line. The bolt/carrier group and charging handle are omitted so you can customize those parts to suit your needs. (Why pay for parts you’re only going to replace anyway?) The forged M4E1 receiver has the unique appearance of a custom "billet" receiver, yet accepts standard AR-15 "mil-spec" parts.
Features
- Forged 7075 T6 aluminum receiver, Mil 8625 Type 3 Class 2 hardcoat anodized
- Ejection port cover & forward assist installed
- .250" dia. pivot/takedown pin holes
- 4150 chrome-moly-vanadium barrel, 1-7" rifling, black QPQ finish
- Chambered for 5.56x45 NATO; accepts .223 Remington, too
- A2-style flash suppressor - not pinned or welded
Specifications
- Brand: Aero Precision
- Finish / color: Black
- Fits: AR-15
- UPC: 815421023312
Buying from WBT Guns
- Delivery: Complete uppers ship to a licensed dealer only. Free pickup at our La Mesa store, or select the California gun store you want it sent to at checkout.
- Payment: Pay in full, put 50% down with the balance due in 14 days, or finance with Credova.
- Questions: Call (619) 667-9453 or email sales@wbtguns.com. FAQ
WBT Guns is family-owned in La Mesa, California, and has shipped parts and receivers to California buyers since 2012.
A note on accuracy. We work hard to keep every listing correct, but specifications, images and compliance details come from many sources and can contain errors or change without notice. Images may show a configuration that is not California-legal. If a detail on this page matters to your decision, call us and we will confirm it against the actual firearm before you order. The compliance information here is general in nature and is not legal advice; California and local laws change, and the configuration described is confirmed at the time of sale. All sales are subject to applicable federal, state and local law and to the buyer's eligibility to purchase.
