I was thinking about buying a glock frame online to replace mine. I know the frame has to ship to an ffl, my question was do I have to register the gun all over again

Yup. Another serial number. Another gun

I was thinking about buying a glock frame online to replace mine. I know the frame has to ship to an ffl, my question was do I have to register the gun all over again

Might as well just buy a new gun if gotta register again!  I read somewhere that if you were to buy parts for your glock and swap them when parts break down, it would have been cheaper to just buy another gun of the same model. 

I was thinking about buying a glock frame online to replace mine. I know the frame has to ship to an ffl, my question was do I have to register the gun all over again

I was thinking about the same thing for my g22 4th gen. Tried to take out one of the pins without a punch tool and I screwed up the edges around the hole, plus didn't know u had to shimmy the damm sliide release to get the damm pin out, but yah I f#ucked up the area around the pin and then I tried to shave it down and made it worse, so now as anal as I am I want to get a new lower.  So spend 200 or I might ceracote it with a different finish and make it custom. Anyways did u find a new lower and if so how much n where?

I was thinking about the same thing for my g22 4th gen. Tried to take out one of the pins without a punch tool and I screwed up the edges around the hole, plus didn't know u had to shimmy the damm sliide release to get the damm pin out, but yah I f#ucked up the area around the pin and then I tried to shave it down and made it worse, so now as anal as I am I want to get a new lower.  So spend 200 or I might ceracote it with a different finish and make it custom. Anyways did u find a new lower and if so how much n where?

I know the feeling of being "anal"....its more like OCD!

I know the feeling of being "anal"....its more like OCD!

Most definitely! The small things like that erk the crap out of me! Lol