New from Plinker Tactical are full guns. They have an SBR and a bull barrel currently available. When used with the 25-round mags that come with the guns, they have bolt hold-open on an empty mag, something that not many rimfire ARs have. It’s a better re-creation of full-size AR shooting, particularly when used for training by professionals who need to simulate the real thing. (Though how many professionals are using 25-round AR mags?)