Been lurking for awhile and finally signed up. Have been building both small and large frame ARs for a good number of years now. I tend to lean towards nonstandard calibers and the challenges involved with making those work. 17HM2, 380, 7.62 Tokarev, 17 Fireball and 221 Fireball are all in the success pile for the small frames along with the usual 9mm, 300blk, 223 etc. Large frames so far are in 260 and 308 for the normal stuff and 375 Raptor and 280 British (2 year project) for the non standard stuff. Next large frame I’m leaning towards 250-3000 Savage which should be fun. Anyway glad to be able to jump on here and share my stuff and learn some more from the members.