Stern Defense MOD5 M-LOK | .45 ACP | 6″ Barrel

The Stern Defense MOD5 M-LOK upper is a factory-built AR-15 upper group configured for .45 ACP. It combines a free-float M-LOK handguard machined from 6061 aircraft aluminum with a 6″ Black Melonite-finished barrel and a 7075-T6 anodized receiver. The assembly ships with a fully assembled bolt group and mil-spec charging handle for straightforward installation on a compatible lower.

Product Specifications

• The caliber is .45 ACP.
• The barrel length is 6″.
• The barrel finish is Black Melonite.
• The barrel material is Chrome Moly Steel.
• The handguard is a free-float MOD5 M-LOK machined from 6061 aircraft grade aluminum.
• The handguard finish is Black Anodized.
• The receiver is machined from 7075-T6 aluminum and hard-coat anodized.
• The bolt is made from 8620 AISI steel with a Mag-Phosphate finish.
• The rate of twist is 1:16″.
• The upper includes a mil-spec charge handle with an ergonomically designed latch for one-handed manipulation.
• The ejection port is enlarged and configured to support larger rounds such as the .45 ACP.
• The bolt assembly ships fully assembled with firing pin, spring, retaining pin, extractor, and extractor spring plus proprietary center and roll pins.
• The receiver is a mil-spec flat top and includes a laser-engraved dust cover and forward assist.
• The bolt is reported to function with Colt SMG and Glock magazines and is compatible with standard AR-15/M16 charging handles.
• The UPC is 850001176576.

This upper is suited for building a dedicated .45 ACP AR-15 platform for pistol-caliber carbine use and for range training or competition where a dedicated .45 ACP upper is desired. It presents a practical option for shooters who want a stable, corrosion-resistant barrel finish and a modular M-LOK interface for accessories.