https://greyhive.com/videos/watch/52a8b98f-170c-4f51-a816-90f51b6e5959 This is experimental. Proof of concept. Do not try this! These tungsten spacer weights are almost drop-in ready. Continuing the quest to fit the 9mm AR Gentle Recoil System in a carbine buffer tube with the least amount of modifications. Using a flat wire spring, Kynshot RB5000HP hydraulic buffer, and two TUNGSTEN spacer weights made from Pinewood Derby Racer Weights. They all fit in a carbine buffer tube and provide functional last round bolt hold open, essentially miniaturizing the GRS while providing all the benefits. Details: https://blowback9.wordpress.com/2024/06/13/tungsten-rounds-carbine-gentle-recoil-system/ None of my videos are sponsored and do not contain paid promotions. 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 19:29:22 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/52a8b98f-170c-4f51-a816-90f51b6e5959 All rights reserved, unless otherwise specified in the terms specified at https://greyhive.com/about and potential licenses granted by each content's rightholder.