My goal is to make it look as close to this as I can. d

The base model of the firearm is the Remington 1911 R1 Enhanced but there are two models of it, a threaded and a non threaded version. The muzzle break looks like a A2 model for the AR-15. I've never tried modifying a gun and I'm sure this is something a gunsmith would have to work on but I'm not sure which way to proceed. I'm worried a threaded version of the 1911 will leave a gap between the break and the rest of the gun but I've also seen muzzle breaks that replace the end of the gun as well which would require the non threaded barrel. Any ideas on how to achieve the look of the arms in the picture?