We are proud to offer this kit for those interested in assembling their own AR15. Although there are many manufacturers of so-called MIL-SPEC parts, we have gone to great lengths to insure the parts we provide are of the highest quality and compatible with a wide assortment of available receivers. We at Precision Firearms always recommend purchasing the highest quality parts available to assemble your AR15. Our Kit Includes a Magpul MOE Winter Trigger guard as standard. Trigger has been polished to reduce gritty trigger feel and create a sharp clean pull with as little creep as possible while still using the Mil-spec trigger and hammer.