It did in the beginning as the ring that's supposed to sit flat against the upper receiver threads isn't welded/machined onto the outer barrel. This was remedied by shimming the portion of the barrel that slides into the upper receiver with scotch tape (I think I needed like 4 layers around). Now it sits very tight and absolutely no wobble. It's solid. I love how beefy that barrel is though.
Looks like he's running a Knight's M4 Sniper/Match rail over a 16" barrel with a PRI flip up FSP/gas block.
Pretty much what I run. hahaha
Mine has a King Arms M4 Match/Sniper RAS, CA PRI front flip up, PDI 16" heavy outer barrel, and a Troy medieval flash hider.
Sorry Danke, that's not the Megaforce that the Megaforce lower is referring to.
I know what Megaforce is...
Anyways, on topic: Here's my AR w/ EO Tech 552.
16" General Purpose AR. The perfect compromise for long range and closer engagements.
-G&P M16 base gun
-King Arms KAC M4 Match RAS
-Magpul MIAD grip
-CA Crane stock
-PDI 16" outer barrel
-JBU Troy flash hider
-Tango Down VFG
-CA Front flip up sight
-TM 300m KAC flip up sight
-EO Tech 552
-Viking Tactics 2pt sling (amazing sling)