https://greyhive.com/videos/watch/4f21d46c-f64a-4644-87bf-e41e4d1413af 17.8oz. one-of-a-kind custom solid tungsten tool-alloy buffer. Will it cycle in a 3" barrel 9mm AR using bulk range 115gr 9mm ammo? What if we add another 11oz. of tungsten mass? If 3" won't cycle, will a 16" barrel cycle it? This is a tease of the new Overmass Phase 2. I've already busted the myth that any commercially available buffer is "too heavy" for 9mm. 9mm blowback can cycle with a LOT more mass than what people believed it could. It's practically impossible to over-mass a 9mm AR with commercially available parts without being absolutely ridiculous about it. Next I'm going to push it to it's maximum limits with a 16" barrel. YouTube Compliance: This video is not sponsored and does not contain paid promotions. All magazines in use hold under 30 rounds. All firearms are semi-auto only. All products shown are lawful to own. This video is an artistic production. I wear ear plugs, or muffs, or both, in every shooting video. Disclaimer: Blowback9's videos are filmed at a private shooting club in a controlled setting under the supervision of trained professionals. Blowback9's videos are for entertainment purposes only. Do not try to recreate or mimic anything seen in Blowback9's videos. Do not act in any way based upon any of the information found in Blowback9's videos. The accuracy of the information in Blowback9's videos is not guaranteed or warranted in any way. You, and only you, are responsible for the consequences of your actions. By watching Blowback9's videos you agree that we will not be held liable for any injury to yourself, others, or property resulting from attempting anything based on what is shown or described in these videos. Tue, 10 Nov 2026 19:39:40 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/4f21d46c-f64a-4644-87bf-e41e4d1413af All rights reserved, unless otherwise specified in the terms specified at https://greyhive.com/about and potential licenses granted by each content's rightholder.