https://greyhive.com/videos/watch/e72aa9b1-2310-40fe-a074-52c8c492b09a YES, I'M USING A FACTORY GLOCK MAGAZINE. Progress on the Aero EPC/Angstadt Arms build 9mm AR build. What has happened so far. Still have some fixing to do and then it will be out to the range. After thinking about it, I decided to keep using the Aero buffer tube, just open up the channel to use the KAK tool. The magazine I used in the video is an unfired factory Glock 19 magazine.  It would be considered a Gen 3 magazine with single side notch and center ambi notch.  Black follower #6.  Gen 3, 4, and 5 mags use the same follower, but G5 is orange in color.  These are extremely common.  I was able to adjust the LRBHO finger by placing it in a vice, twisting the finger forward and tapping it inward with a hammer and brass punch.  It now sits properly on the Glock LRBHO pad when the follower comes up. This video is not sponsored. I received no income or compensation for this video. Disclaimer: All videos on the Blowback9 channel are for entertainment purposes only. None of the videos are for intended for instructional purposes. 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. Blowback9's shooting videos are filmed at a private shooting club in a controlled setting under the supervision of trained professionals. I wear ear plugs, or muffs, or both, in every shooting video. Tue, 10 Nov 2026 19:08:07 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/e72aa9b1-2310-40fe-a074-52c8c492b09a All rights reserved, unless otherwise specified in the terms specified at https://greyhive.com/about and potential licenses granted by each content's rightholder.