Unfortunately most units were not nearly as uniform with their modifications, and even some of the units with more standardized modifications they were more guidelines than rules.
Maybe someone will recognize the combination of all of these modifications as unique to a specific unit, but I do not.
Yours is at least a combination of fairly unusual modifications with the sewn rank, sleeve pocket flap velcro extending to the edge of the flap, and the IR square on the back.
With all these features together I think there is a chance of identifying it, some modifications are so generic there is no hope of determining the unit.
The problem with velcro uniforms is all the patches come off making identification very difficult.
With that being said, at a guess yours may be from one of the Special Forces Groups.
I highly suggest you look through this great thread started by nkomo showcasing many different modifications, but even at 24 pages it is not complete due to the endless variation in modified uniforms.
Edited by Cap Camouflage Pattern I, 20 January 2020 - 09:56 PM.