@Bugleboy I recently bought a second G21 .45 gen3 to convert to a carbine. It was an older police training trade-in that had been in the FFLs stock for a while… and the barrel has rifling. Can’t be the original barrel because glock barrels are polygonal. Looks like it’s a FrankenGlock as well. It won’t matter since itll be getting a carbine barrel but I’ll be keeping that with the spares just in case 