The Midwest Industries Drop-In Curved Single-Stage Trigger Kit is a self-contained enhanced trigger and lower parts kit designed for AR-style platforms. It features a light 3.5 lb trigger pull and a curved trigger profile for predictable, repeatable operation. The kit includes an ambidextrous safety option, a Magpul trigger guard (MAG417), anti-walk pins, and the common lower parts needed for installation. Components are finished and heat-treated where specified; the product carries Midwest Industries’ limited lifetime guarantee and is made in the USA.
Key Specifications
- The trigger pull weight is set at 3.5 lb for a light, repeatable break.
- The trigger configuration is a curved single-stage design for straightforward operation.
- The trigger group is designed to fit small pin size (.154) lower receivers.
- Interior contact parts are manufactured from S7 tool steel with heavy-hit hardening and black nitride finish for wear resistance.
- The cassette housing is blue anodized aluminum for a durable, corrosion-resistant finish.
- The kit is a self-contained drop-in design that installs quickly without fine-tuning.
- Included safety offers an ambidextrous selector with 60 / 90 degree options for user preference.
- The kit fits most .223 and .308 AR-style platforms as stated by the manufacturer.
- The package includes anti-walk pins and screws to secure critical components.
- The assembly includes a Magpul trigger guard (MAG417) and a full lower parts kit for convenience.
This kit delivers a practical, ready-to-install upgrade for shooters seeking a lighter, crisper single-stage trigger and a complete lower-parts solution. With hardened internal components, an anodized housing, and an ambidextrous safety option, the unit is built to provide consistent function across a range of AR platforms while simplifying installation and setup.
