SIGforum.com    Main Page  Hop To Forum Categories  Mason's Rifle Room    MCX Barrel gas Port

Moderators: Chris Orndorff, LDD
Go
New
Find
Notify
Tools
Reply
  
MCX Barrel gas Port Login/Join 
Junior Member
posted
So. I purchased a 16" MCX barrel off of a friend and have since cut it down to 10.5. It functions perfect with standard ammo, but it will not function properly with subsonic ammunition. The fired round will eject, but it appears as though the bolt does not come back enough to pick up the next round in the magazine. Thus turning my AR into an expensive bolt action rifle. Does anyone have a suggestion on how to correct this issue. I am considering that the gas port needs to be opened, but I cannot find any information about how bid the port needs to be opened to.

Thanks for any assistance.
 
Posts: 3 | Location: SC | Registered: October 08, 2017Reply With QuoteReport This Post
Member
posted Hide Post
What caliber is the gun?
 
Posts: 316 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
Web Clavin Extraordinaire
Picture of Oat_Action_Man
posted Hide Post
Assuming this is a 300 BLK gun.

I don't have both barrel assemblies handy, but I'm pretty sure the gas port on the 16" 300 BLK barrel is considerably farther forward than on my 9" barrel. I think the pistons are also different lengths.

I'm no gunsmith, but I'm not sure if just opening the port would work if the whole gas system is tuned for a length.


----------------------------

Chuck Norris put the laughter in "manslaughter"

Educating the youth of America, one declension at a time.
 
Posts: 19362 | Location: SE PA | Registered: January 12, 2001Reply With QuoteReport This Post
Member
posted Hide Post
The gas system is barrel length specific. The system for one length may not work properly for a different length. Especially longer to shorter.
 
Posts: 12 | Registered: January 13, 2005Reply With QuoteReport This Post
  Powered by Social Strata  
 

SIGforum.com    Main Page  Hop To Forum Categories  Mason's Rifle Room    MCX Barrel gas Port

© SIGforum 2021