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Swapping out a mil-spec trigger is one of the fastest ways to shrink your groups, and this Timney is about as easy as that upgrade gets. It's a self-contained cassette module set for a 4 lb single-stage pull, and the moment you press it you'll feel the difference. No mushy take-up, no grit, just a clean break that Timney compares to a bolt action rather than a combat rifle trigger. The solid shoe gives you that familiar curved trigger face, so it feels natural right away without asking you to relearn your finger placement.
The internals are where your money goes. The hammer is wire-EDM machined from S7 tool steel, which handles hard primers and heavy round counts without chipping, while the rest of the components are cut from A2 tool steel and heat treated to Rc 56-60 for a long service life. Everything is captive inside a lightweight aluminum housing, so there are no loose springs or pins to juggle during install. Timney hand-assembles, tests, and calibrates each unit before it ships, and it's backed by their lifetime warranty.
This one is built specifically for small-pin lowers running .154" trigger and hammer pin holes, which covers the vast majority of modern AR-15 and M4-pattern rifles. It's a genuine 100 percent drop-in, using your rifle's original hammer and trigger pins, and Timney's design keeps those pins from walking out without needing dedicated anti-walk pins. Most folks have it done in a few minutes with basic tools, and the included instruction chart walks you through it with clear photos.
The 4 lb pull is a smart middle ground. It's light enough to reward good trigger control on the range or in competition, yet not so light that it feels twitchy on a general-purpose build. If you want a single-stage trigger with immediate engagement and a repeatable break every time, this configuration earns its long-standing reputation.
It's built for small-pin AR-15 and M4-pattern lowers that use .154" trigger and hammer pin holes, which is the standard on most modern ARs. If your lower runs the older large-pin Colt spec, you'll want the large-pin version instead. When in doubt, measure your existing pin holes before ordering.
No. This is a genuine 100 percent drop-in cassette that uses your rifle's original hammer and trigger pins, so there's no fitting, filing, or adjusting required. Most people install it in a few minutes with basic tools by following the included instruction chart.
No, this Timney is factory-set and calibrated to 4 pounds and is non-adjustable. Each unit is hand-assembled and tested before it ships, so the pull is consistent right out of the box. If you want a different weight, Timney offers this same trigger in other pull weight options.
You don't. Timney's design captures the pins and keeps them from walking out on its own, so there's no need to buy separate anti-walk pins. It installs and holds up using your rifle's standard pins.
| UPC | 081950668236 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 668S |
| Color | Black |
| Length | 7.0500 |
| Model | |
| Product Type | Trigger |
| Style | Non-Adjustable |
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