Hello all. I am in the market for a black rifle and looked at both of these. With the exceptions of markings, both appeared to be identical. Both had a 16" barrel, collaspible buttstock, and removable carrying handle with a rail up top for mounting optics. Price wise, they were worlds apart. The Colt was going for $1500. The Spike's was $900. I've heard that the Colt is as close to milspec as you can get in the civilian market and has good quality. Looking at the specs on Spike's website makes me think the same is true for the ST-15, but honestly, I'm having trouble wrapping my head around alot of the technical jargon they used. My question is, "Is the Colt that much better? Or would I just be paying for the Colt brand?" Wanna kill these ads? We can help!