If it has iron sights and is not a heavy barrel match upper, you should be GTG. Actually even if it wasn't a match to the rules you can shoot anyway.I want to come for the Garand match next month and I also want to come for the modern military match in September. Question about the modern military match: Do the rifles have to be in their original configuration? I have what one may consider a frankenstein-AR, but it’s all Colt, it’s just that it’s a mismatched upper and lower in terms of the serial numbers. I have a rifle I could bring instead but it would be cool to test out the range of the AR with iron sights.