I changed mine for two reasons, I thought the quad rail was cool when I bought it, but I ended up not liking it. It's bulky IMO and it gets snagged up in my hunting cloths, also I realized how heavy the gun was after I bought it and wanted to lighten it up. It really wasn't any trouble per-say but by buying the new hand guard I got a look I wanted shaved off some weight and bulk and eliminated 3 rails I really wasn't using. Also I can now ditch the quick release sling post I was using because the rail has 3-4 drilled holes to accept a sling at