The EOTECH EXPS3 is one of the finest optics in the world, it's just totally not suited to the normal application of an IMPACT IMO, having said that unless you are planning to use a magnifier and NV for close range rat shooting in darkness? then it could be the best choice you made?
I dont think many that own an Impact won't have double loaded at some point, not sure what you mean by "air came out of my fingers" though?
Does the gun function properly once reassembled?