Key points:

The Supreme Court's decision in Vanderstock v. ATF upheld the ATF's ability to regulate "buy, build, shoot" kits as firearms, but it did not establish a clear test for what constitutes a firearm, leaving open the possibility for future challenges.
Colorado's new legislation aimed at regulating "gas-operated" semiautomatic handguns is so broadly and vaguely written that it could potentially encompass nearly all semiautomatic handguns, leading to significant legal and practical challenges.
Judge Van Dyke's dissent in the Duncan v. Bonta case effectively criticized the majority's opinion that firearm magazines are mere "accessories," highlighting the integral role magazines play in the functionality of firearms.