XM177E2 COMPLETE UPPER RECEIVERS
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Brownells
Overview
The Brownells XM177E2 Complete Upper Receiver is a fully assembled unit designed for the AR-15 platform, chambered in 5.56 NATO. It features a carbine-length gas system, which contributes to reliable cycling and performance, making it ideal for a variety of shooting applications. This upper receiver is commonly found in builds that aim for a classic military style or those looking to replicate the iconic XM177E2 configuration.
Specifications
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Build history on GunPartPicker
Builders on GunPartPicker first added the Brownells XM177E2 COMPLETE UPPER RECEIVERS to a build in August 2026.
Updated · from real builds on GunPartPicker
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