6.5 Grendel Doublestar
A BHO 18" 6.5G barrel/matching bolt with a BA gas block. Had a linear comp on it at the time but changed to an SLR 30 cal short brake. Primary Arms 4-14 FFP ACSS optic. 15" ALG VOE tube. Everything else is pretty standard.
Upper is an Aero Precision w/o forward assist and the lower is a milspec Doublestar from around 2008.