All AR's that stick to the Mil Spec print, uses “.154” pins and does not have a “sear block” (found on some Colt’s). Outside of that, we have not had an AR that it would not fit and function in.
The AR Gold trigger is NOT compatable with the "AR57" upper. Use of this non-Mil Spec upper will cause an interfearence with the trigger and damage the gun and maybe you. Don't do it.
Yes! We now offer the SR Gold trigger. Same feel and function as the AR Gold, but fits SR25, current DPMS .308 and AR10's – no problems. In addition our unique design is well suited to the higher recoil weapons.
Now that's a great question to have to ask. While it will fit, it will not actuate the "improvement" HK added. That said, our next trigger, the non-adjustable Operator model will function in the HK416.
"From the moment I first saw the AR Gold trigger, I could see that it was a completely new concept in trigger design. It was clearly well thought out and engineered to address the problems that have hounded conventional AR triggers for years. I had complete confidence in it from the start.” Jerry Miculek