I have been learning more on ARs for the past year. My first AR is not chrome lined in the bore and chamber.

By how much more faster will the barrel erode or corrode vs a chrome lined rifle?

How much more faster would it ware down with high rates of fire with a suppressor?

Everything I have researched suggest that the non chrome line barrels won’t last as long BUT does not give a definite time frame.

I know that many factors can play in this.

Serious high power competitors will be looking at replacing their nonchrome lined barrels (they don't use chrome lined barrels) 4000 to 7000 rounds (you'll get a lot of different opinions) depending on various conditions.  That is because flyers start occurring at 600 yards.  At closer ranges, the deterioration is much less noticeable and most people wouldn't notice.  This can be compensated for by loading overall cartridges lengths a little longer due to the throat erosion, but there are limits to this.

With chrome lining, barrel life will be greatly increased, but it usually will take away from longer range performance.

There are other benefits to chrome, such as corrosion resistance and easier cleaning.

For most people either barrel will work well.  If you actually do shoot out a barrel, the cost of the ammo to do it is far more than the cost of a barrel.  Consider the barrel a consumable item if you shoot that much.

If shooting other cartridges, such as 300 Win Mag (not in ARs of course0, throat erosion is even more significant.  For 22lr, it is virtually non existent.

Is your barrel just non-chromed CMV or has it also undergone some sort of nitriding?

Barrels these days are usually four options

(1) Plain old barrel steel - has no protective coating, so can erode from hot gasses & corrode if not kept clean

(2) Stainless Steel - stainless is resistive to corrosion (not as much as Chrome or Nitride) but better than plain steel - usually accurate in many match barrels are made of SS

(3) Barrel Steel that is Chrome Lined - Resists wear & Corrosion very well (Chrome is tough stuff), but tends to be less accurate as precise control of the exact depth of the chrome lining is not always 100% consistent.

(4) Barrel Steel that is Nitrided - Resists wear (hardens the steel) & Corrosion very well, and if the barrel is accurate, the Nitride treatment won't degrade accuracy as chrome lining may.

Adco did a test on a stainless barrel. Results were amazing. I think its pinned on their industry page.

All I know and from specs is 4150 chromoly.

What is the make/model? Do you have any pictures?

My original StG.58 manufactured in 59 is not CL and still shoots great.

Mag dumps are what can damage your barrel.

Normal shooting? Not really. Enjoy your AR.