The Windham upper came with glacier guards, look to be double heat shield, an M16 carrier and unmarked bolt. It is chrome lined as well. Shoots great ejects to 3-5 o'clock with 62 gr. and heavy buffer.
I also recently picked up an M&P15 new old stock. (not sport) haven't shot this yet. smaller m4 handguards with black heat shield. lighter AR15 carrier. Bolt marked MPI 1:9 twist chrome lined. The M&P bore dia. is smaller than the Windham if cleaning rod resistance is any measure
I also recently picked up an M&P15 new old stock. (not sport) haven't shot this yet. smaller m4 handguards with black heat shield. lighter AR15 carrier. Bolt marked MPI 1:9 twist chrome lined. The M&P bore dia. is smaller than the Windham if cleaning rod resistance is any measure