I'm looking at getting a 14.5" BCM middy upper with a permanently attached Battle Comp 1.5. My concern is that having the Battle Comp permanently attached, I'm "locking" myself into the hand guards that are installed at the time I purchase the upper. The upper (VTAC TRX) doesn't have a FSB, so I thinking that I shouldn't have any issues if I decide to tinker down the road. Am I missing something here? Wanna kill these ads? We can help!