I'm interested in getting the UTG pro super slim handguard in the 17" but do you guys think a 17" handguard on a 16" barrel is too long? It would end up looking like this (not my gun, just found through Google): ARMSLIST - For Sale: 17" Rail on a 16" Barrel AR-15 5.56/.223 AR15 (http://www.armslist.com/posts/5252862/minneapolis-minnesota-rifles-for-sale--17--rail-on-a-16--barrel-ar-15-5-56--223-ar15-)