Re: rebuild or start over?
Dave, like I told Dead. Its a parts gun, no matter the sum of the parts new and no matter the manufacturer of the parts, its not going to be worth half of what you paid for it together.
Part it out, if you want a different rail, buy the new rail, sell the old rail at 75% of new retail and it will be gone fast. Want a new barrel, same thing, buy the new barrel and sell the old one, might have to sell for less than 75% retail of a new one but it will still sell.
Barrel and rail swaps on an AR are like putting together leggos, do it one way then change it the next day. Thats why I HATE perm attached muzzle devices.
Buy the new rail and let it set ..... dont pull the old stuff until you have all the parts. You currently have a functioning gun that you can use. No need to tear it apart and have a pile of parts sitting around. The whole gun assembled is going to take up less space than the parts kicking around unassembled.