ErikW Posted February 20, 2004 Share Posted February 20, 2004 (edited) When my upper came back as a single-shot (no gas reaching the carrier) I figured something was wrong with the gas tube. With my new gas tube arriving yesterday, I just drifted out the roll pin and moved the gas block forward. The hole in the tube is facing up. Is that right? It doesn't seem like there can be a gas tunnel at the top of the DPMS gas block, it's just thin aluminum there. DPMS gas block. Note hole for gas tube. The Marine Corps M16A2 manual is no help. I guess stock M16-type guns have a step in the tube so assembly is obvious. My replacement DPMS tube has no such step. (I have a custom upper with an Armalite floating handguard I can't remove, so I can't really tell if the tube in the gun right now has a step.) Help me out here: hole facing up to the heavens or hole facing down to the barrel? Edit: Looking as the gas block, the hole in the tube can't possibly face up. It should face down to the gas hole in the barrel. Edited February 20, 2004 by Erik Warren Quote Link to comment Share on other sites More sharing options...
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