I ' m mixed about this . As much as communication is essential in this game , I also like not having to deal with twats . <| sep |> Cleans work up to a certain point with an axle , and then they don ' t . The large diameter and lack of spin on the collars makes a clean not viable once the weights get heavy enough . Koklayev was an accomplished weightlifter , and ran into this issuexegv 4 hIsmBgWe ' re actually using the same axle there , hahaAs for the winter equation I ' m in Western Montana right now . Before that , I was 30 minutes away from the Canadian border in North Dakota . When winter happens , I will dress warm , like I did before , haha . Xd 94 lSjFv 30 <| sep |> So to make senseThe top option would be a purpose built lower for pistol cal cartridges . The lower option would use a standard AR lower with a pistol cal upper and mags from Macon Armory . This would be my first venture in building an AR so this may be a silly question . In a perfect world I would love to have a . 223 upper and a . 45 upper that go to the same lower . . 45 cuz the ammos slightly cheaper since I would be able to feed 4 different guns with it , but the . 223 would be nice if I go to the desert or to the rifle range . Would that be possible or would there need to be other parts inter changed ? I suppose I should put that info in the OP , I blame all the turkey on my oversight xD