CMMG's Lower Parts Kit for the Mk3 contains 4 color-coded bags with parts separated into them. The clear bag contains the .308 takedown pin, .308 receiver pivot pin, two (2) takedown pin detents, two (2) takedown pin detent springs. The yellow bag contains the bolt catch, bolt catch plunger, bolt catch screw, bolt catch spring, buffer retainer, and buffer retainer spring. The red bag contains two (2) hammer and trigger pins, hammer spring, trigger spring, disconnect, and disconnect spring. The blue bag contains the magazine catch, magazine catch spring, and magazine release button. The green bag contains the safety selector, selector detent, selector detent spring, lock washer, and pistol grip screw. Also included are the hammer, trigger, and pistol grip.
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This is my second one of these. The fact that I repeated should speak for itself. Shoots high speed ammo and ultra high speed flawlessly from the get go. With federal high speed match got 10rd 3/4" group at 50yds first try out of box. With SK match got 10 rd 1/2" group at 50yds on first try. With subsonic SK had to reach up and gently"bump" the bolt with my finger to finish reloading cycle but after figuring that out had no problems. I'm as pleased with this one as much as my last one. Practice, practice, practice.
WARNING This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. (California law requires this warning to be given to customers in the State of California.)