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ZRODelta
Overview
The ZRO Delta AR-15 Forged M4 Stripped Upper Receiver is designed for builders looking to create a robust and reliable platform, specifically tailored for the 5.56 NATO caliber. As a stripped receiver, it provides the essential foundation for your upper assembly, allowing you to customize it with your choice of components. This upper is commonly used in builds featuring a carbine gas system, making it a versatile choice for various applications.
Builders have been adding the ZRODelta Zro Delta AR-15 Forged M4 Stripped Upper Receiver to their builds on GunPartPicker since June 2026. All time, it ranks #414 of the 1,554 upper receivers builders have added. Builds with this upper receiver are nearly all chambered in 5.56 NATO, split between carbine-length (55%) and mid-length (26%) gas systems, and nearly all AR-15.
It was hard to find in August 2026, in stock on only 3 of the 10 days we checked, and today the one retailer we track has it in stock. The best price drifted down from $899.99 to $719.99 over August 2026 without a real sale. Buying today, the lowest price is $719.99 at Brownells, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
We ranked every upper receiver by how often it shows up in real builds on GunPartPicker.
Read the guide: Most Popular AR-15 Upper Receivers →The part most often added in each category by the 113 builds that include this one
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Zro Delta AR-15 Fire Control Group Laser Cut Disconnector
Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Zro Delta Ar-15 Forged M4 Stripped Upper Receiver
| Build | Parts | Total |
|---|---|---|
 | 26 | $3172.43 |
 | 12 | $1033.57 |
 | 10 | $1497.13 |
 | 18 | $1475.88 |
 | 32 | $7261.07 |
| 24 | $2753.20 |
 | 27 | $2093.15 |
 | 9 | $1420.06 |
| 12 | $1157.54 |
 | 16 | $1224.69 |
 | 21 | $2023.10 |
 | 11 | $1462.10 |
2 global ratings
Top reviews
ZRO Delta forged M4 stripped upper feels more expensive than its price tag. Anodize is dark consistent matte. Forging marks are minimal. M4 feed ramps cut correctly. Mates cleanly with a forged lower with no play. Sleeper mid-tier upper.
ZRO Delta forged M4 stripped upper has clean machining and consistent anodize. M4 feed ramps cut correctly. Forward assist and dust cover holes are dimensionally correct. Mates to my Aero lower with zero play. Solid mid-tier upper.
