“There is no reason to switch back and forth." I’ve been in places where one’s politics is met with deadly response. Having participated in war and riots in this country, I am not so naïve as to believe that it can’t happen here. So certain parts in certain guns could be appropriate given the right (unfortunate?) time and place. No slight intended.....Rocket
Why would you need to switch carriers? If one of the two you have works in the pistol, but the other one doesn't, then you have no valid reason to put the non-working carrier in the pistol. I can understand wanting a backup BCG in case the one in the gun fails, but a backup that doesn't function in your firearm isn't really a backup is it?
I'm not saying there's no reason to switch from pistol to rifle and back - That's your choice and your preference - I'm assuming you only have one lower based on your comment - I wasn't implying there is no reason to switch from pistol to rifle - I was saying flat out that there's no reason to swap back and forth from one BCG to another in one gun unless one of the carriers breaks during use.
If you have two complete firearms (rifle and pistol) and both BCGs work in the rifle, but only one works in the pistol, then my advice is to stick to what works - If you want an upgrade, then it's time to do some research and find out what is compatible with your gun.
Politics, riots, war and self defense have nothing to do with what I said.
There is no appreciable benefit to switching from one BCG to another unless you're upgrading to a better one and are just keeping the old one as a backup - Swapping from one to another repeatedly is going to accelerate the wear on the receiver, the locking lugs and the bolt.
A non-working BCG serves no purpose at all in a gun unless you're intending to use it as a "decoy".
Perhaps there is a language barrier that caused my point to be unclear?