In Stock
Stern Defense AR-15 SD 4 MOD4 Complete Upper Receiver 9mm Luger 4" M-LOK
Sold byMidwayUSA•Posted Apr 27, 2026
Compare prices for Stern Defense AR-15 SD 4 MOD4 Complete Upper Receiver 9mm Luger 4" M-LOK$443.48
Price and stock data refresh continuously from MidwayUSA.
Deal Summary
- Currently in stock.
- Caliber: 9mm
- Category: parts
- UPC: 850001176200
- SKU: 897799
- Brand: Stern Defense
Price History
Deal Details
The Stern Defense AR-15 SD 15 MOD4 Upper Receiver Assembly features a mil-Spec flat top upper receiver with Stern Defense laser engraved dust cover and forward assist. Machined from 7075-T6 aluminum and hard-coat anodized. Mil-spec dry film lube in the bore. The free float M-LOK handguard from Stern Defense offers excellent ergonomics while remaining lightweight and strong. This handguard is M-LOK compatible to accept your favorite attachments. Features a secure clamp on mounting system that ens
Other Offers for This Product
Active offers from your catalog for Stern Defense AR-15 SD 4 MOD4 Complete Upper Receiver 9mm Luger 4" M-LOK.
Comparing 4 retailers carrying this product
Lowest Price: $345.96
Highest Price: $443.48
You Save: $97.52
Avg Discount: 5% off
STERN DEFENSE MOD5 UPPER 9MM 4IN BBL MLOK RAIL
Stern DefenseBattleHawk ArmorySKU/UPC: 850001176200
$345.96$429.27Save 19%
View at BattleHawk Armory
Stern Defense 9mm Upper 4in Melonite Barrel 1 to 10 Twist MLOK AR15 PCC
Stern DefenseShooting SurplusSKU/UPC: S76200
$401.84
View at Shooting Surplus
Ar-15 Sd Mod 4 9mm Upper Receiver 4in M-Lok Complete - Sd Mod 4 9mm Upper Receiver 4in M-Lok Complete Black
Stern DefenseBrownellsSKU/UPC: 100033499
$419.27
View at BrownellsStern Defense AR-15 SD 4 MOD4 Complete Upper Receiver 9mm Luger 4" M-LOK
Stern DefenseMidwayUSASKU/UPC: 897799
$443.48
View at MidwayUSA