Simply Triggers
HighLine Firearms
Oregon Rifleworks
Defensive Arts
Low Price Guns
Sporting Systems
Buster Beaver Cerakote
Gun Deals
Southwest Firearms
Advertise on Northwest Firearms
J&B Firearm Sales
Messages
1,625
Reactions
4,108
So I just tore my ar down for a cleaning. I usually don't remove the quad rail cause it extends past the gas block and has the front sight mounted. Well I did and found that gas has been coming out the bottom of the tube/block. I should clarify, coming out where the tube goes into the block. Rifles got about 20-30000 rounds through it. Most of those have been shot with a can on. Do I need a new block? Tube? What's goin on, is the can causing too much pressure or something? Heat?
 

MountainBear

Messages
5,130
Reactions
7,323
Is the rifle malfunctioning? If it is, then start by changing the cheap parts first (gas tube likely) and then the block to see if it fixes the issue. If it isn't malfunctioning or damaging parts, then I wouldn't worry.
 
Messages
1,625
Reactions
4,108
It just started to malf. Failure to eject. I chalked it up to being dirty. Got a lot of rounds this time before cleaning.
 
Messages
1,846
Reactions
2,416
you didn't mention malfunctions .....not normal lol

most AR's leak at the tube/block junction, not enough to matter but enough to build up some serious carbon.....in fact I have never seen a clean one
 
Messages
2
Reactions
0
Make sure the set screws that hold the block in place are tight. Also, if it's having an ejection problem with that many rounds, could be gas rings. Quick check for that, remove bolt carrier assembly, extend bolt out, and set on a hard surface on bolt face. If the weight of the assembly causes the carrier to drop, you may need new gas rings. Check extractor for tension and damage, and gas tube for clearance. Factory ammo or reloads? Jacketed or lead bullets?
 
Messages
1,625
Reactions
4,108
Make sure the set screws that hold the block in place are tight. Also, if it's having an ejection problem with that many rounds, could be gas rings. Quick check for that, remove bolt carrier assembly, extend bolt out, and set on a hard surface on bolt face. If the weight of the assembly causes the carrier to drop, you may need new gas rings. Check extractor for tension and damage, and gas tube for clearance. Factory ammo or reloads? Jacketed or lead bullets?


Well rings and extractor seem to be perfectly normal. I'm leaving the malfs to cleanliness. Block is pinned in place and has never been removed.
 

MountainBear

Messages
5,130
Reactions
7,323
In my experience as a gunsmith, about 90% of malfunctions that walk into my shop can be solved by a proper cleaning. Good place for you to start, and from the sounds of it, that is your likely culprit. Good luck!
 
Messages
1,625
Reactions
4,108
you didn't mention malfunctions .....not normal lol

most AR's leak at the tube/block junction, not enough to matter but enough to build up some serious carbon.....in fact I have never seen a clean one


10-4, I'll keep shooting it and keep an eye out on the carbon buildup. If it gets significant quickly I'll start with the tube
 

MountainBear

Messages
5,130
Reactions
7,323
Often, it isn't the owners fault. Sometimes, the gun just needs to be taken down further than field stripping. A lot of old .22's need to be stripped to pins and springs to clean out that 50 years of gunk, oil, and unburned powder...

Most gun owners aren't equipped to strip guns completely apart... And get them back together. Before my gunsmithing days, I was guilty of taking my smith a baggie o' gun...
 
Advertise on Northwest Firearms
Southwest Firearms
Cerberus Training Group
Copeland Custom Gunworks
Sporting Systems
Let Freedom Ring

Latest Resource Reviews

New Classified Ads

Top