Last updated: October 13, 2026 For decades, the answer to "Can I put a stock on my pistol?" was a firm "only after the ATF says yes." As of October 9, 2026, that answer has changed in a big way, but it hasn't become a free-for-all. This guide walks through the ATF's latest open letter, the court case behind it, and the rules that still apply. Disclaimer: This article is general information, not legal advice. Firearm law is changing quickly and varies by state and locality. Consult a qualified …