AR-15s
My first 2 AR's were Colts. Bought it in 1977. Nothing else on the market at that time.
General manager for a chain of Guns stores in the 80'S, the heyday of Colts, H&K, etc... Have owned many AR platform rifles in the last 45 years and the current, major names build excellent quality arms. Todays materials and CNC machining makes it hard to screw up. Colt has a Service Department for returns just like everyone else.
Like any other major purchase, get opinions but rely on your own research. Tons of info on the web.
Colts has changed hands many times since then and is no longer the supplier of rifles to the Military. It lost that contract years ago. The military went to FN .
CZ recently acquired Colt who was in trouble again.