The Timney 667S-ST is a self-contained single-stage drop-in trigger with a straight shoe for small-pin (.154 in) AR-15 and M4 pattern lower receivers.
Single-stage trigger certainty with a straight shoe — the 667S-ST is Timney's modern classic for small-pin ARs.
The Timney 667S-ST drops a clean, hand-calibrated single-stage pull into small-pin (.154 in) AR-15 lowers through a straight trigger shoe. The straight profile encourages a lower finger position and a press that drives straight to the rear — mechanics that many shooters find improve their groups — while the self-contained drop-in module guarantees the pull arrives exactly as Timney tested it.
No creep, minimal overtravel, positive reset: the fundamentals executed at the standard Timney has maintained since 1946, in the easiest install format the AR-15 world offers.
Why shooters choose the 667S-ST
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Clean single-stage break — hand-calibrated, no creep
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Straight trigger shoe — modern press mechanics
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Self-contained drop-in module — minutes to fit
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Small-pin (.154 in) fit — standard Mil-Spec lowers
What the 667S-ST 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 the straight shoe and low finger position suit deliberate, aimed shooting. 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, straight shoe |
| Made in |
USA |
| Brand |
Timney Triggers |
| MPN |
667S-ST |
Fundamentals, cleanly executed. Order the 667S-ST 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.
