Gas block clearance

[GStephen]

I put a new low profile handguard on my dpms 308 upper.  The adjustable gas block just barely clears the inside of the upper.  I would guess about .025” on each side.   How much actual clearance is required?   Or am I going to get a block that clears more?  
 

  

[GStephen]

I might add, it’s a 16” mid length heavy barrel and 12” handguard.  I wouldn’t expect a lot of movement.  But I don’t know.  

 

 

[DNP]

I don’t know that you’ll have an issue, but you could shoot it a bit and see what you think. A little off each side with a dremel would create a little more clearance if needed. 

[sketch]

I ran into this problem with a .458 socom build , gb was actually touching.  I ran a file down the inside of the hg instead of the gb.  ^^^ shoot first and tune it if needed.  Considering breaking in and ammo grade for optimal performance 🍻