The CMC Single-Stage Curved AR-15/10 Trigger (brand part no. 90501) is a drop-in, 2.5 lb trigger group finished in black with a small-pin fit and a traditional curved bow. CMC has manufactured drop-in trigger groups for the AR-15/10 platform since 2003, and this unit carries the same proprietary machining process the brand built its reputation on. That process produces sear engagement surfaces finished to roughly 1-2 RMS, far smoother than the 32 RMS typical of EDM-cut competitors, for a cleaner, more consistent break shot after shot. It’s a straightforward upgrade for a range gun, competition rifle, or precision build looking for a lighter, crisper single-stage pull.

Key Specifications

• Breaks at a light 2.5 lb pull weight for a crisp, single-stage press.
• Uses a single-stage design with no takeup before the break.
• Shaped with a traditional curved trigger bow.
• Built to a small-pin fit for lower receivers using small-diameter trigger pins.
• Finished in black to match standard AR fire-control components.
• Machined with CMC’s proprietary process to a 1-2 RMS sear surface finish, smoother than standard EDM-cut parts.
• Installs as a drop-in unit for AR-15 and AR-10 lower receivers, no gunsmithing required.
• Backed by CMC’s original AR-15/10 drop-in trigger design, manufactured since 2003.
• Housed module measures approximately 7.6 inches in length.

Frequently Asked Questions

Is this a single-stage or two-stage trigger? Single-stage, with no takeup before the 2.5 lb break.

Does it fit both AR-15 and AR-10 lowers? Yes, it’s built as a drop-in unit for both platforms.

What makes the sear finish different from a stock trigger? CMC’s proprietary machining process finishes the sear surfaces to about 1-2 RMS, smoother than the roughly 32 RMS left by standard EDM cutting.

Buy the CMC Single-Stage AR Trigger

A precision-machined sear is the difference between a gritty factory pull and a clean, repeatable break. Order the 2.5 lb curved trigger from CMC Triggers through our Lubbock, Texas gun shop for fast, direct shipping, and browse more AR triggers to keep tuning your rifle.