11-18-2019, 12:31 PM
In the group buy section BFT has state 12” GB Faxon and Green Mountain 12” 6.5 Grendel barrels use carbine length gas port at .068 inches.
Colder weather does tend to decrease velocity/pressure but I have shot my PSA 12” nitride at near zero degrees with Wolf 100 grain FMJ steel cased ammo. I read where PSA used .068-.070 inch gas port but I haven’t measured mine. My 12” uses the supplied carbine buffer and spring with a SBA3 pistol brace but PSA 12 inch 6.5 Grendel comes with an adjustable gas block. My pistol has functioned 100% out the box without any adjustments to the AGB.
Colder weather does tend to decrease velocity/pressure but I have shot my PSA 12” nitride at near zero degrees with Wolf 100 grain FMJ steel cased ammo. I read where PSA used .068-.070 inch gas port but I haven’t measured mine. My 12” uses the supplied carbine buffer and spring with a SBA3 pistol brace but PSA 12 inch 6.5 Grendel comes with an adjustable gas block. My pistol has functioned 100% out the box without any adjustments to the AGB.