Having owned and still own the Crye AC and Massif ACS, I would say go with the Massif. Its super comfortable and a really rugged well built combat shirt plus you can get them really cheap on ebay now. The Crye AC is a nice shirt but its expensive and hard to justify sometimes. I also prefered the material the Massif shirts are made from compared to the Crye. Its like an elasticy stretch material compared to Cryes which is what a normal jacket/trousers are made from.
