Timney Trigger #510 for the Remington 700, 721, or 722. Black with safety.
The #510 is made from a solid block of heat treated steel. Thus, there is no connector bar to come loose.
Differing from the factory, Timney's design blocks the trigger, not the sear. On safe, there is no way to move the trigger. Also, when the safety is taken off, there is absolutely no motion of the trigger.
No screws, drilling, or tapping required. Trigger comes pre-set from the factory at 3lbs and is adjustable from 1-1/2 to 4 lbs.
The trigger offers a serrated 3/8" wide trigger for better control and is adjustable for creep, overtravel and backlash.
I have fit several in to Boyd's stocks in minutes. A bit of a rasp or file, maybe 2 or 3 strokes, and they are grand.
Here is a link to Timney's installation instructions.