Description
Pistol caliber carbines run a little different from a standard AR, and the blowback action puts real stress on trigger internals. That's exactly what Timney had in mind when they built the 681. This is a complete, self-contained assembly that drops right into your PCC lower and gives you a clean, single-stage pull without the mushy feel of a stock trigger. It ships factory tuned to a pull weight between 2.5 and 3 pounds, so there's nothing to dial in before you head to the range.
What Sets the Timney 681 PCC Trigger Apart
The housing is machined from 6061-T6 aluminum and finished in Timney's signature gold anodizing, with heat-treated steel internals doing the actual work. The big deal here is the hardened steel bridge inside the module, which is there to shield the trigger components from the heavy bolt blowback that PCCs are known for. That's the sort of detail that keeps a trigger feeling consistent shot after shot instead of getting sloppy over a few thousand rounds of 9mm.
Getting the AR PCC Curved Trigger Into Your Build
Installation is about as simple as it gets. The module uses your rifle's original hammer and trigger pins along with the existing safety, so you drop it in, pin it down, snug the set screws, and you're done. No fitting, no filing, no trip to the gunsmith. This one wears the curved trigger shoe, which is the traditional bow shape most folks are used to, while Timney also offers a straight version if that's more your speed. Folks who run these in competition PCC guns tend to praise how crisp the break is and how solid the reset feels.
Timney has been building triggers in the USA since 1946, and every unit is tested and calibrated by hand before it leaves the shop. If you're chasing tighter groups or faster splits on a 9mm, .40, or .45 carbine, the 681 is a straightforward upgrade that punches well above the effort it takes to install.
Key Specifications
- Manufacturer: Timney Triggers
- Manufacturer Part Number: 681
- UPC: 081950068487
- Fits: AR Pistol Caliber Carbine (9mm, .40, .45)
- Trigger Type: Single Stage
- Trigger Shoe: Curved
- Pull Weight: 2.5 – 3 lbs
- Housing Material: 6061-T6 Anodized Aluminum
- Internal Components: Heat-Treated Steel
- Finish: Gold Anodized
- Adjustment: Factory Tuned, No Adjustment Needed
- Country of Origin: USA
- Style: Drop-In
What’s Included
- Timney AR PCC single-stage drop-in trigger module (curved shoe)
Frequently Asked Questions
What does the Timney AR PCC trigger fit?
It's designed for AR-platform pistol caliber carbines chambered in 9mm, .40, and .45. It uses your rifle's existing hammer and trigger pins along with the factory safety. Note that this model is not compatible with the Sig MPX.
Do I need a gunsmith to install the 681?
No. This is a complete drop-in module, so you pull your old trigger, set this one in place, reuse your original pins, and tighten the set screws. Most people have it done at the kitchen table in a few minutes with basic tools.
What's the trigger pull weight and can I adjust it?
The 681 comes factory tuned to a pull weight between 2.5 and 3 pounds and is ready to shoot right out of the box. It's calibrated by hand at Timney, so there are no adjustments to make before hitting the range.
What's the difference between the curved and straight shoe versions?
This is the curved shoe, which is the classic bowed trigger profile most shooters grew up with. Timney also offers a straight-shoe version for those who prefer a flatter face and a more consistent finger placement. Both share the same 2.5 to 3 pound pull weight and internal design, so it comes down to feel and preference.





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