This product is the complete bolt assembly that is shipped standard with the NBK. This bolt will work perfectly in a 737R, we have just replaced the shroud and the knob with alumium to cut about 4 oz on this bolt. This bolt comes assembled and ready to use.
Based on the supremely popular 737R, the Impact Precision NBK brings you everything you love...
737R ACTION BODY ONLY! NO BOLT! Comes with trigger hanger/pins comes with bolt stop This...
This kit comes with the spring, plunger, and med Sako extractor.