STERN DEFENSE MOD5 UPPER 9MM 4IN BBL MLOK RAIL
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- 8.5"from $498.56, in stock
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Stern Defense
Overview
The Stern Defense MOD5 Upper is a complete upper receiver designed specifically for the AR-9 platform, featuring a compact 4-inch barrel chambered in 9mm. This upper is ideal for builders looking to create a more maneuverable firearm, making it suitable for close-quarters engagements. Commonly found in short-barreled builds, it offers a sleek profile without sacrificing performance.
Specifications
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Build history on GunPartPicker
Builders on GunPartPicker first added the STERN DEFENSE MOD5 UPPER 9MM 4IN BBL MLOK RAIL to a build in September 2026.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today the one retailer we track has it in stock. Prices barely moved in October 2026, holding around $443.48, with no real sale all month. Buying today, the lowest price is $443.48 at BattleHawk Armory, which matches the best price we saw in October.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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