Nope, not accurate. 1939 in US v Miller court held that sawed of shotguns were illegal reasoning that sort of weapon had no reasonable relation to the preservation or efficiency of a “well regulated Militia.” Not until DC v Heller in 2008 did the court hold that the Second Amendment protects a civilian’s right to keep a handgun in his home for purposes of self-defense.
By a 5-4 decision. One justice different and the result would be different.