Originally Posted By: Howard NguyenThanks, Joe. The JP spring is supposedly to produce 4.5 - 5 lbs trigger pull when used with standard trigger component. What would the trigger pull be if used with RRA 2-stage trigger?
I have JP 3.5 springs(yellow) on two RRA NM two stage triggers
and one Armalite NM trigger. All three of them break between
3.2 and 3.4 on my gauge. Once the first stage travel is taken
up the break is surprisingly clean. I do polish and moly
grease the sear surfaces, so any travel is very smooth.
Squeeze
P.S. I have not had any problem with light primer strikes,
using the JP hammer springs. I don't use military surplus
ammo so there it may be an issue. I have 4 AR-15s set up
with JP springs(2-223/5.56, 1-6.8mm SPC, and 1-6mm WOA),
and have never not had a round go bang due to a light hammer
strike. I have a pile of hammer springs, to replace the
JP hammer spring if the SHTF and I have to scrounge and shoot
military ammo.
P.P.S. If one doesn't use the JP Hammer Spring, due to light
strike concerns, I wouldn't spend the money on the JP Spring
kit. There isn't much improvement with just replacing
the trigger and disconnector spring. The hammer spring puts
much of tension on the trigger sear, and trigger pull force
has to over come that tension and the spring tension of the
trigger spring. Lighten ALL of the springs will produce the
lightest trigger pull force. The national match hammers
seem to get good hammer strikes with the lighter springs.
A mil-spec hammer may be more likely to have issues, but the
mil-spec triggers I have worked with did not.