I own 2 bushmaster a1's circa 1999 that have been flawless. I only use iron because they will never see any use beyond 100 yards, SelfDefense or otherwise. The only additive as been a magpul afg.
* I use the afg as a grip... I do not use it as a platform to grip the handguard like a fire hose like its intended. I like to form up behind the rifle and get small.. I dont and wont do all this boxer stance/ firehose thing.. I am just too old skool for the new kool.
"I believe that the right of the citizen to keep and bear arms must not be infringed if liberty in America is to survive." - Ronald Reagan