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ZEV built its name on tight tolerances and clean machining, and this forged upper carries that reputation right into your AR-15 build. It ships stripped, so you get a clean canvas ready to accept your choice of dust cover, forward assist, charging handle, barrel, handguard, gas system, and bolt carrier group. If you like control over every part of your rifle, this is where a build starts.
Everything begins as an American-made 7075-T651 aluminum forging, then gets final-machined to better-than-mil-spec dimensions with tolerances held to plus or minus .001 inch. That precision is the whole point here. It means your barrel seats square, your handguard indexes true, and mil-spec or aftermarket parts drop in without a fight. The receiver wears a true black Class 2 Type 3 hardcoat anodize, which is the tough, abrasion-resistant finish you want on a part that sees range time and travel.
The top rail is a laser T-marked Picatinny rail, so lining up backup irons or clocking optics across receivers is straightforward. M4 feed ramps are cut standard, giving you smooth, reliable feeding once you pair it with a matching barrel extension. Weight comes in right around 7.2 ounces, keeping things light without giving up strength.
Because it plays nice with all mil-spec parts kits, this upper works whether you are running a lightweight carbine, a precision-minded setup, or something in between. Builders who have used ZEV parts on other platforms tend to point to the finish and fit as standout qualities, and this upper follows that same track. Pair it with a quality barrel and BCG and you have got the backbone of a rifle set up exactly how you want it.
Since it ships stripped, you will need to add a dust cover, forward assist, charging handle, barrel, handguard, gas block, gas tube, muzzle device, and a bolt carrier group. Think of it as the bare foundation that lets you pick every component yourself. That flexibility is the main draw of buying a stripped upper.
Yes. ZEV machines this upper to better-than-mil-spec dimensions with tolerances held to plus or minus .001 inch, so mil-spec and most quality aftermarket parts kits drop right in. That tight machining is a big reason builders reach for it.
It is designed around 5.56 NATO and .223 Remington builds, which covers the vast majority of standard AR-15 configurations. The M4 feed ramps and standard receiver dimensions match what those cartridges call for when paired with the right barrel and BCG.
The receiver carries a true black Class 2 Type 3 hardcoat anodize, which is the abrasion-resistant, corrosion-fighting finish commonly used on hard-use firearm parts. It holds up well to handling, travel, and repeated range sessions.
| UPC | 811745029207 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | UR-556-FOR |
| Shipping Weight | 0.545 |
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