The Timney Competition 668S is a single-stage drop-in trigger for AR-15 and M4 pattern rifles, fitting small-pin (.154 in) lower receivers.
The classic Timney Competition — a hand-calibrated 4 lb (1.8 kg) single-stage trigger that has anchored match ARs for decades.
The Timney Competition 668S drops a glass-crisp 4 lb (1.8 kg) single-stage pull into small-pin (.154 in) AR-15 lowers. Each unit is hand-calibrated: no creep, minimal overtravel and a break so repeatable it becomes part of your subconscious — exactly what deliberate match shooting demands. The 4 lb (1.8 kg) weight is the time-proven balance point: light enough for precision, deliberate enough for stages shot under adrenaline.
This is the trigger that introduced generations of AR-15 shooters to what a proper break feels like, in a self-contained drop-in module that installs in minutes and holds its calibration for the life of the rifle.
Why shooters choose the Competition 668S
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Hand-calibrated 4 lb (1.8 kg) break — glass-crisp, zero creep
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Long match record — decades on competition lines
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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 Competition 668S 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 deliberate 4 lb (1.8 kg) break suits aimed, unhurried shooting. Large-pin receivers are not compatible, so confirm your pin size before ordering. Function-check the rifle fully before live fire.
Specifications
| Platform |
AR-15 / M4 |
| Fits |
Small-pin (.154 in) AR-15 / M4 lower receivers |
| Type |
Single-stage trigger |
| Finish |
Black |
| Pull weight |
4 lb (1.8 kg) |
| Made in |
USA |
| Brand |
Timney Triggers |
| MPN |
668S |
The classic competition break. Order the 668S today — in stock at Xtreme Tactical Gun Parts with £5 tracked UK delivery in 7–10 business days.
Explore more: all Rifle Triggers, AR-15 Parts & Accessories or browse all Timney Triggers.
