12-17-2013, 03:46 AM
You have to love great engineering.
The original bolt catch worked fine on the 5.56 SAC/Seekins AR, but the Grendel SAC/Seekins AR had both failures to lock open and failures to release until we consulted Seekins. They said they had developed—and they promptly provided—their newly designed bolt catch. Problem solved.
Because of that finding, I cannot assume the Phase 5 will work on the Grendel. I am reasonably confident that the Phase 5 will work on the 5.56, so I bought one that I will install on the 5.56 lower, then swap upper and mags to see how it functions with the Grendel. If that succeeds, I will buy another for the Grendel.
The original bolt catch worked fine on the 5.56 SAC/Seekins AR, but the Grendel SAC/Seekins AR had both failures to lock open and failures to release until we consulted Seekins. They said they had developed—and they promptly provided—their newly designed bolt catch. Problem solved.
Because of that finding, I cannot assume the Phase 5 will work on the Grendel. I am reasonably confident that the Phase 5 will work on the 5.56, so I bought one that I will install on the 5.56 lower, then swap upper and mags to see how it functions with the Grendel. If that succeeds, I will buy another for the Grendel.