The roll pin on the charging handle on my AR came out on me and buggered up my receiver a bit, and I'm looking at whether I should just replace the pin or upgrade from the standard mil spec charging handle. Some of them are pretty expensive for what seems like a simple part but what's the consensus on upgrading them? I'm a right hander but my oldest daughter who also shoots the rifle with me is a lefty if that matters, I'm wondering if it would be worth getting something ambi.