07-23-2017, 03:01 AM
Thanks for posting Smbob, sounds like the recoil impulse is a little lighter with 90 grain Federal TNT. What buffer were you using which appeared to heavy. My 16" 6.5 Grendel both have 6 position milspec stock with standard carbine buffer and spring. Both my 16" 6.5 Grendel uppers also function with Spikes T-2 and Colt H-2 buffers.

