I put the 300bk in the safe and replaced the upper with a DD M4V1 .556 but, here is a picture of the markings on the 300.That screenshot looks like a Daniel from back in the day when you could order one as you wanted, a long time ago. I had a 5.56 gun with that same handguard and grip/stock, but IIRC, it was not laser marked with the "300" or anything else on the upper.