Short-barreled rifles (SBRs) are one of the most popular ways to build a compact, maneuverable AR-15. A barrel under 16 inches makes the rifle easier to handle in tight spaces, easier to store, and easier to carry in a vehicle. But a shorter barrel changes how ammunition behaves, and not every cartridge performs well when you cut the barrel down. If you're planning an AR-15 SBR, caliber is the first decision that shapes everything else: your gas system, buffer, ammunition cost, recoil, noise, an …

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 …

Shop for AR ammo and you'll find one cartridge sold in dozens of loads: different bullet weights, different advertised velocities, and different intended uses. What the box rarely tells you is how that ammunition will behave in your barrel length. Behind every factory cartridge is a powder chosen by the manufacturer to burn at a specific rate for a specific case and a specific barrel length. As a shooter, you can't change that powder, but you can choose the right cartridge and the right load fo …