JD machine tech PR3 upper and lower, daniel defense 12.0 lite rail, rock creek 5R 1:11.25 SR25 profile barrel w/ surefire brake. barrel and chamber work done by on target arms in frackville, PA. the group shown was by the gunsmith after getting the gas tuned (168gr FGGM). scope is a US optics SN-3 t-pal 3.2-17.