https://greyhive.com/videos/watch/38dd5ecf-1bb7-4e7b-aad0-e58a374e0fc6 In Episode 2 of the AT3 Tactical AR-15 Barrel Guide, we cover rifling and twist rates from smoothbore blunderbuss history through early spiral rifling by Kollner and Kotter, the Minie ball revolution, to modern AR-15 manufacturing methods including button rifling (common and cost-effective), cut rifling (precision match-grade), and cold hammer forged (CHF) for maximum durability and longevity. Learn how lands and grooves impart gyroscopic stability to prevent keyholing, why twist rates like 1:7 vs 1:8 vs 1:9 matter for stabilizing 55 grain to 77 grain 5.56 bullets, and how to match twist rate to your ammo for better accuracy and performance, perfect for AR-15 builds, duty rifles, or precision setups. Timestamps: 0:00 Intro & Smoothbore vs Modern AR 0:47 History of Rifling (1490s to Minie Ball) 3:55 Modern Rifling Methods Overview 4:52 Button Rifling 7:19 Cut Rifling 9:40 Cold Hammer Forged (CHF) 13:15 Other Methods (Broach, EC) 14:35 What Rifling Does: Lands, Grooves, Spin & Stability 18:10 Twist Rate Basics (1:7, 1:8, 1:9 Explained) 21:14 Football Analogy & Wrap-Up Follow us Instagram: @at3tactical Twitter/X: @AT3Tactical Facebook: facebook.com/AT3Tactical 🤝 Transparency We strive to provide the growing AR-15 shooting community with helpful, fact-driven information about the AR-15 & AR-15 style firearms and accessories to do our part in bolstering a more well-informed community and safer when handling, building, or shooting their personal firearm. Let's face it, we all have to start somewhere when it comes to becoming a firearms expert. Our goal is to help you get there one small step at a time. The purpose and content of this video is to provide general information regarding the products and their applications on any/all related firearms that strictly comply with all federal, Minnesota state, and local laws. The viewer expressly agrees that AT3 Tactical LLC; its officers, directors, employees, and agents shall not be liable for any damages or losses related to the products and information provided in this video and hereby agrees to hold the foregoing harmless from any such losses or damages. AT3 Tactical LLC is a Federal Firearms Licensee. AT3 Tactical | Build The Ultimate AR Wed, 17 Jun 2026 09:01:17 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://greyhive.com https://greyhive.com/lazy-static/avatars/5746210d-885d-44b2-9be0-92bf1e4d34df.webp https://greyhive.com/videos/watch/38dd5ecf-1bb7-4e7b-aad0-e58a374e0fc6 All rights reserved, unless otherwise specified in the terms specified at https://greyhive.com/about and potential licenses granted by each content's rightholder.