Yankee Hill Machine Co Low Profile Gas Block, Pinch Screw, .750", Black YHM-9384
Yankee Hill Machine Co Low Profile Gas Block, Set Screw, .750", Black YHM-9383
TROY Gas Block, Low Profile, .750", Fits 556NATO AR-15, Black SGAS-A4L-00BT-00
LBE Unlimited .750 Gas Block w/Rail, Upper Receiver Height, Set Screws Included, Black Finish ARRGB-UH
Diamondhead USA, Inc. Low Profile Gas Block, 556NATO, .750", Fits AR-15, Black 3131
Diamondhead USA, Inc. Receiver Height Gas Block, 556NATO, With Rail Overhang, .750", Fits AR-15, Black 3101