Sig 551, 556, 556xi and 522 rifles, carbines and pistols, 1st and 2nd stage pull reduced about 1.5 lbs, second stage creep reduced to a very short, smooth clean break. Price runs $75, the lower receiver is needed.
MPX, MCX, pull weight reduced with a very crisp hammer release. 3# runs $85, 4# runs $75. The lower assembly with the trigger group is needed.
M400, 516, 716: A 4lbs pull, very short, smooth, clean break. $45, add $5 for "speed hammer" modification. 3lbs pull price is $59, 2.5lbs is $69. the 2.5lbs uses a new JP match spring set installed. 2.5 & 3# have the hammer tail removed ("speed hammer") included in the price.
Priority Mail return postage is included in all prices!
Any questions, or to order, please EMAIL me.