Stern Defense MOD4 9mm AR-15 Upper, 4\" Barrel, Melonite Finish
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Stern Defense
Overview
The Stern Defense MOD4 9mm AR-15 Upper features a complete assembly with a compact 4-inch barrel, specifically designed for the AR-9 platform. This upper receiver offers a streamlined setup that enhances maneuverability, making it ideal for close-quarters engagements while chambering the versatile 9mm round. Builders often incorporate this upper in short-barreled builds aimed at maximizing efficiency and handling in tactical scenarios.
Specifications
Available Merchants(1)
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Build history on GunPartPicker
Builders have been adding the Stern Defense MOD4 9mm AR-15 Upper, 4\" Barrel, Melonite Finish to their builds on GunPartPicker since February 2026. All time, it ranks #659 of the 1,714 upper receivers builders have added.
Today the one retailer we track is out of stock. Listed prices start at $419.27 at Classic Firearms for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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