CMC Triggers AR-15 Drop-In Flat Trigger Group 4.5 lb
CMC Triggers
$174.00
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CMC Triggers
CMC Triggers AR-15 Drop-In Flat Trigger Group 4.5 lb
The CMC Triggers AR-15 Drop-In Flat Trigger Group delivers a crisp, consistent 4.5 lb pull in a self-contained unit that makes upgrading your AR-15 or AR-10 faster and easier than ever — all from the original inventor of the drop-in trigger group since 2003.
- Crisp 4.5 lb single-stage pull with a flat trigger bow for improved leverage and control
- Proprietary machining achieves a superior 1–2 RMS surface finish on all sear engagement surfaces
- Self-contained drop-in design installs in minutes with no gunsmithing required
- Compatible with standard small-pin AR-15 and AR-10 lower receivers
- Precision-machined from high-quality tool steel for long-lasting durability and reliability
- Proudly manufactured in Texas by the original drop-in trigger group innovator
Who This Is For
This trigger is ideal for competitive shooters, precision rifle enthusiasts, and AR-15 owners who want a noticeable upgrade over their mil-spec trigger without spending hours on a complex installation. Whether you're building a new rifle or improving an existing one, the CMC flat trigger group offers a polished, repeatable break that supports faster follow-up shots and tighter groups at the range.
Specifications
| Brand | CMC Triggers |
|---|---|
| Model | Drop-In Flat Trigger Group |
| Trigger Type | Single-Stage |
| Trigger Bow | Flat |
| Pull Weight | 4.5 lb |
| Surface Finish | 1–2 RMS (Proprietary Machining) |
| Pin Size | Small Pin (.154") |
| Compatibility | AR-15 / AR-10 |
| Installation | Drop-In (No Gunsmithing Required) |
| Country of Manufacture | USA (Texas) |
Frequently Asked Questions
Will this trigger fit my AR-15 lower receiver?
This CMC drop-in trigger group is designed for standard small-pin AR-15 lower receivers using the common .154" trigger and hammer pin diameter. It is also compatible with most AR-10 platforms using the same pin size. If your lower uses large pins (.171"), CMC offers a separate large-pin version. Always verify your lower receiver's pin size before purchasing.
What makes the flat trigger bow better than a curved trigger?
A flat trigger bow places your finger in a more consistent position shot after shot, which many shooters find reduces perceived pull weight and improves trigger control. The flat face also distributes pressure more evenly across your fingertip, making it a popular choice for competitive shooting, precision work, and anyone who wants a more repeatable trigger experience.
How does the CMC surface finish compare to EDM-machined triggers?
CMC's proprietary machining process achieves a 1–2 RMS surface finish on all critical sear engagement surfaces — far smoother than the 32 RMS finish typical of EDM (electrical discharge machining) processes. This ultra-smooth engagement surface translates to a cleaner, crisper break with less creep and a more consistent reset, giving you a trigger feel that rivals custom-built options at a fraction of the cost.
