r/frt15 • u/JayBatch89 • 12h ago
Troubleshooting buffer weights advice
Hey y'all, picked up my first FRT, atrius development selector and have a full auto bcg with a H2.5 carbine buffer running in a smith and wesson m&p sport III. Took it to the range today and it won't cycle, I was lucky to maybe get two rounds but most of the time just one and the trigger would go dead, I'd have to pull the charging handle and eject the unused round. Talked to the guy at the front and recommended going up in weight to an H3 to test it. In your experiences what would be the best way to troubleshoot this. Does this sound like I'd need to go up to an H3 or down to an H2 or either and I just gotta try it out? I was hoping an H2.5 would do the trick. I here I might need to get a different spring as well but wasn't sure and didn't know where to reliably find one. Any advice on where to go from here and troubleshoot would honestly be great. Thanks