STERN DEFENSE MOD5 UPPER 9MM 8.5IN BBL MLOK RAIL
2 options
- 4"from $443.48, in stock
- 8.5", this page
Click to see full view
Stern Defense
Overview
The Stern Defense MOD5 Upper is a complete upper receiver designed specifically for AR-9 builds, featuring an 8.5-inch barrel that's ideal for those seeking a compact and maneuverable setup. This upper is chambered in 9mm, allowing for reliable performance with subsonic ammunition, making it suitable for both range shooting and personal defense. You'll commonly find this upper in builds focused on 9mm caliber, where versatility and precision are key.
Specifications
August 2026 on GunPartPicker
STERN DEFENSE MOD5 UPPER 9MM 8.5IN BBL MLOK RAIL ranked #168 of the 690 upper receivers builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since January 2026. All time, it ranks #604 of the 1,636 upper receivers builders have added.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today the one retailer we track has it in stock. Prices barely moved in August 2026, holding around $498.56, so there haven't been real sales lately. Buying today, the lowest price is $498.56 at BattleHawk Armory, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
Not sure which upper receiver to pick?
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 →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the 4 builds that include this one
Breek Arms Warhammer MOD2 AR-15 Ambidextrous Charging Handle - FDE
Battle Arms Development 9mm BCG - Nitride
Radian Talon-GI Safety Lever - FDE
CMMG MkGs AR-15 Stripped Lower Receiver Armor Black
Adaptive Tactical Ltg Lightweight AR Tactical Grip
Rise Armament Super Sporting AR15/10 Single Stage Trigger - Flat - Dtom Special Edition
No reviews yet. Be the first to review this product!