But you aren't training with the same rifle. You're training with half the rifle. And you still have to pay that FFL for the lower friend.
I'm training with an upper that's configured identically, but in a lower cost caliber. Whether I put that upper on the same lower as my 5.56 upper uses, or another identical lower matters not. It's the same rifle save the caliber. It lets me shoot at the nearby 25 yard indoor range when my schedule is cramped, and not waste more expensive ammo. I then have practice with same sights, same trigger, same stocks, and same cheek weld when I take the rifle with 5.56 upper out to the gun club with its real rifle range. If the rifle bays are there are all full I can swap to the .22LR & upper shoot on the pistol range until the rifle range becomes available. That way I can maximize my range time.
And this "accuracy myth" you speak of is only a myth in your head. No way that Leggo system rifle you're touting shoots as accurate as a rifle that costs the same price but comes in one piece. It just doesn't happen.
My real world experience differs. AR-15s can be extremely accurate, and they're very easy to accurize.
Go find yourself a T/C rimfire and test it against your mighty AR Frankenrifle.
Like I said in my last post, I own a T/C Contender. I have a .22 Mag bbl for it, and had a .22 LR bbl for it too. My dedicated .22 LR upper built with a 16" CMMG bbl. shot just as well as the 20" .22 LR bbl on the Contender, so I sold the Contender LR bbl. I still have the .22 Mag bbl because it fits a need, and I haven't found a dedicated .22 Mag AR upper yet either.
Find yourself a well built 10/22 (which you can leave in it's condition without constant swaps) and see which one is more accurate.
My dedicated upper is just as accurate as my Marlin Model 60. That Model 60 is just as accurate as friends' 10/22s.
If you think it isn't more accurate to put a Green River barrel on a 10/22 with a really good trigger then you just haven't shot them.
I'll see if White Oak Armament or another match grade AR bbl maker will make me a .22 LR bbl compatible with the Ceiner Atchisson / CMMG type bolts. Once I save up some more money and get Geissle trigger in one of my AR lowers it'll be a fair comparison to the tricked out 10/22.
That's my opinion. It's valid. You can argue all you want. I'm not coming off my opinion. Your problem is you really think I haven't read the reports comparing the accuracy of these setups. I've heard it all from wrong twist, to keyholing, to 1" groups at 50 yards (terrible), etc.. It's always easy to discredit anyone who disagrees with you by declaring they don't know the subject. But do you really think people are going to buy that crock of bull after seeing that technique used for the millionth time? Go ahead and give it a try. I doubt you'll sway many opinions that way. I probably won't either but at least my POV is original.
Your POV is based on what you've read. My POV is based on owning & shooting traditional .22 LR rifles, a T/C Contender with various barrels including .22 LR, and a dedicated .22 LR AR upper. You've heard dedicated .22 LR uppers have the wrong twist & keyhole. I've seen that happen with conversion kits in 5.56 uppers. I've never seen it happen with dedicated uppers. My dedicated upper has a 1:16 twist barrel, which is the same as the factory bbl on a Ruger 10/22.
I don't just jump no the black rifle bandwagon that got rolling when Obama got elected. I think for myself and I don't follow trends. I don't have a Facebook account and I don't have a 1911. When I buy something it's because "I" want it.
I've owned an AR-15 of one form or another since Clinton was in office. I've shoot them all of my adult life including four years in the USAF where I deployed to Iraq twice. I have more training & trigger time on AR-15s than I do any other rifle. It's not about any bandwagon: It's about shooting what I shoot best.
Like I said at the end of my last post here, I appreciate Anschutz & other finely crafted rifles. They're beautiful to look at, they handle wonderfully, and they shoot superbly. They're just not for me. I'm not trying to make you like AR-15s & other so-called black rifles. I understand they're not your thing. I had hoped you could at least appreciate them. I'm sorry that you can't.