I have one of the earlier 527's in 6.5 Grendel. A walnut stock model, could not stand the distressed finish beech, with the 24" pencil barrel. The only times i have been able to shoot it was in extremely hot weather, with sweat running into my eyes, not conducive to shooting good groups. I was getting 1 1/4 - 1 1/2 inch groups with Wolf 123 gr at 100 yards. The ammo i have is brass case. While a nice sporting rifle, lightweight for carrying, it heats up rather quickly with the thin barrel. I doubt if there is enough metal there for a suppressor unless the threads are very fine.