The Timney 667S is a self-contained single-stage drop-in trigger with a curved shoe for small-pin (.154 in) AR-15 and M4 pattern lower receivers.
Timney's modern classic single-stage trigger — the 667S pairs a hand-calibrated break with the curve traditional shooters trust.
The Timney 667S drops a clean, consistent single-stage pull into small-pin (.154 in) AR-15 lowers through a traditional curved shoe. The curve cradles the finger pad and gives instinctive tactile position — the feel generations of riflemen trained on — while the internals deliver Timney's signature: no creep, minimal overtravel, and a reset you feel without hunting for it.
Delivered as a self-contained drop-in module, the 667S installs through your existing pin holes in minutes and arrives exactly as it was calibrated — the same simple promise Timney has kept since 1946.
Why shooters choose the 667S
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Hand-calibrated single-stage break — clean and consistent
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Traditional curved shoe — instinctive finger placement
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Self-contained drop-in module — the easiest install format
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Small-pin (.154 in) fit — standard Mil-Spec lowers
What the 667S fits
Drops into small-pin AR-15/M4 pattern lower receivers with .154 in trigger pins, using the existing pin holes — including UK straight-pull AR-15 builds, where a clean single-stage break is a straightforward upgrade over a factory pull. Large-pin receivers are not compatible, so confirm your pin size before ordering. Function-check the rifle before live fire.
Specifications
| Platform |
AR-15 / M4 |
| Fits |
Small-pin (.154 in) AR-15 / M4 lower receivers |
| Type |
Single-stage drop-in trigger, curved shoe |
| Made in |
USA |
| Brand |
Timney Triggers |
| MPN |
667S |
The classic feel, Timney precision. Order the 667S today — in stock at Xtreme Tactical Gun Parts with free tracked UK delivery in 7–10 days.
Explore more: all Rifle Triggers, AR-15 Parts & Accessories or browse all Timney Triggers.