MPN: 661-S / 664-S / 665-S


  • Self-contained drop in design - no gunsmithing, fitting, or adjusting required
  • Exceptionally smooth, crisp, creep-free single-stage trigger pull
  • Heat treated to Rc 56-60 for long service life
  • Precision-ground engagement surfaces ensure superb reliability and a crisp, clean hammer release

This Timney AR-15 trigger is a Skeletonized model, if you want a non-skeletonized model, please look at the Timney AR-15 Drop In Competition Trigger.


  • Material: Heat Treated Tool Steel Trigger and Sear with 6061-T6 CNC Aluminum Housing
  • Finish: Yellow
  • Type: Single Stage
  • Pull Weight:
    • Model 661: 3 lbs.
    • Model 664: 4 lbs.
    • Model 665: 4.5 lbs.
  • Trigger Style: Curved Trigger
  • Pin Size: Small Pin (.154)


  • AR-15 / AR-10 platforms

**Will not work on AR-15 that have pins .168-.174" in diameter.

**If you are using this trigger for a polymer lower receiver, please contact Timney for a special plate.


Why should you settle for a clumsy, “creepy” trigger that can cause your AR-15 to “suddenly” lose its accuracy when you try to fire it? If you are currently fighting with a stock trigger that seems to throw a wrench in the works every time you use it, you may want to consider a serious upgrade. Why not the Timney Skeletonized Trigger?

The pull weight of this Skeletonized Trigger is pre-set at three pounds, four pounds and four-and-a-half pounds. The drop-in design of this skeletonized trigger enables you to make your replacement using the original hammer and trigger pins of your rifle. This Timney 661s trigger is designed to resist pin rotation and walkout. The single-stage trigger is housed in a 6061-T6 aluminum alloy that’s anodized for durability and strength.

If you are looking for a trigger that will complement your AR-15 and give you a better shooting experience, check this Timney skeletonized trigger out.

The Timney Skeletonized Trigger comes in 3 LB, 4 LB, and 4.5 LB pull weight.

Why Timney Skeletonized Triggers?

Timney Triggers has been in the business of providing gun owners of all backgrounds with high-quality, creep-free, single-stage triggers featuring a smooth feel and a clean break. Founded by a man who understood the need for easy-to-install triggers following World War II, Timney continues to serve the gun community with triggers unmatched by any other.

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