Stag 6 has a 1/2" guarantee and lives up to it with good ammo. I've never read of a maker giving that claim with a specific bullet/ammo tho.
Les Bauer gives a guarantee as well but their guns aren't cheap. A stag 6 runs about 1K and the value/return can't be beat in my opinion
I've never even heard of them.
Is that for all their uppers/rifles or is it model specific?
Travis