the other day at free state i noticed a guy at the range was shooting an AR but he had a forward charging handle that was in the actual front rail portion as well as a regular charging handle. he left before i could ask him about it but the most important feature about it was being able to charge the weapon without breaking shoulder contact. i was wondering if any one knew about a kit, aside from buying a completely new upper, that worked the same way. my thoughts were that it must be in the piston, portion of the front rail in order to charge the bolt back.