11-17-2019, 11:52 AM
Just ordered a 28" 6mm AR barrel from X-Caliber. Talked to them and they said that in their experience, the rifle length has system is a problem. They strongly recommend the rifle +2" arrangement in addition to the AGB. I went with that. I see that the Satern has the rifle length on their upper - I would anticipate needing the AGB for certain.