I always had a feeling they were manufactured by the same company building Sightron scopes. I bought several of the AG scopes a few years back when Cabela's clearanced them in their Bargain Cave, and they were very similar to the Sightron scopes I had. Specifically, they were very close to the SII's. Turrets were the same, power ranges the same, with the same "nitrogen port" sticker in the exact same place under the turret saddle.