Outcast
CGN Ultra frequent flyer
Just checking to see if anyone else is experiencing broken extractors on their AR when using metal cased ammo. 200 rounds through my AR with MFS steel cased ammo and my extractor broke. Damn.
Anyone experiencing blown AR extractors with metal cases
- Thread starter Outcast
- Start date
i was talking to a gunsmith a couple days ago and he told me that steel cased ammo puts a beating on extractors except for bolt actions with a mouser bolt.
we wernt talking specific to ARs but he said to only shoot brass....i was told to give the surplus 308 away or to buy a spare bolt for my remington.
we wernt talking specific to ARs but he said to only shoot brass....i was told to give the surplus 308 away or to buy a spare bolt for my remington.
Leviathan024
CGN Ultra frequent flyer
- Location
- GP Alberta
steel case if FINE. i have had an extractor and bolt lugs break with brass case only before
- Location
- East ontario
steel case will wear thoses parts faster but they should be changed evey few thousan rounds any way.
Steel cases will not wear out your extractor so fast that its must be horribly avoided
As someone already mentioned it is the way steel cases expand to seal the chamber when fired. It does not seal against the chamber walls as well and therefore there is more residue that sticks on the chamber wall
The result is cases get appreciably harder to extracted , putting undue stress on the extractor. Next time at range , fire a 100 to 200 of the steel case but pull back on charging handle of chambered case to see how hard it is.
Having said that, your extractor should not have broken so quickly
Here is a 7.62X39 case that was stuck after 300 rds. The chambered rounds was progressively harder to pull out ( sluggish extraction ....I could hardly pull back the charging handle )
I kept firing away until it stuck the case
BTW - I have shot thousands off steel case 5.56 and 7.62x39 out of ARs without "$%&* up my rifle"
I keep a chamber cleaning rod ( like a cleaning rod but hande doesn't rotate ) with a bronze 44cal brush to clean out chamber at the range when shooting 5.56 steel case
As someone already mentioned it is the way steel cases expand to seal the chamber when fired. It does not seal against the chamber walls as well and therefore there is more residue that sticks on the chamber wall
The result is cases get appreciably harder to extracted , putting undue stress on the extractor. Next time at range , fire a 100 to 200 of the steel case but pull back on charging handle of chambered case to see how hard it is.
Having said that, your extractor should not have broken so quickly
Here is a 7.62X39 case that was stuck after 300 rds. The chambered rounds was progressively harder to pull out ( sluggish extraction ....I could hardly pull back the charging handle )
I kept firing away until it stuck the case
BTW - I have shot thousands off steel case 5.56 and 7.62x39 out of ARs without "$%&* up my rifle"
I keep a chamber cleaning rod ( like a cleaning rod but hande doesn't rotate ) with a bronze 44cal brush to clean out chamber at the range when shooting 5.56 steel case
Last edited:
- Location
- chilliwack BC.
thanx for that TRG-42
- Location
- Western Canada
I have seen two XCR extractor blow out with mfs steel cases ammo, one gun was me and the other was a buddies
What caliber? How many rounds through the guns? What sort of MFS, the zinc-coated or the lacquered?
I put about 4500 rounds of MFS through my one AR two summers ago.
A large number of failure to extracts, but nothing broken.
However I didn't clean it till the 4500 rnd mark and just kept it wet with Gunzilla, but DAMN!! Really freakin dirty when I took it apart. It looked like some one stuck chewing gum in the chamber.
I posted some pics before and I'll see if I can find them again.
A large number of failure to extracts, but nothing broken.
However I didn't clean it till the 4500 rnd mark and just kept it wet with Gunzilla, but DAMN!! Really freakin dirty when I took it apart. It looked like some one stuck chewing gum in the chamber.
I posted some pics before and I'll see if I can find them again.
Steel cases will not wear out your extractor so fast that its must be horribly avoided
As someone already mentioned it is the way steel cases expand to seal the chamber when fired. It does not seal against the chamber walls as well and therefore there is more residue that sticks on the chamber wall
The result is cases get appreciably harder to extracted , putting undue stress on the extractor. Next time at range , fire a 100 to 200 of the steel case but pull back on charging handle of chambered case to see how hard it is.
Having said that, your extractor should not have broken so quickly
Here is a 7.62X39 case that was stuck after 300 rds. The chambered rounds was progressively harder to pull out ( sluggish extraction ....I could hardly pull back the charging handle )
I kept firing away until it stuck the case
BTW - I have shot thousands off steel case 5.56 and 7.62x39 out of ARs without "$%&* up my rifle"
I keep a chamber cleaning rod ( like a cleaning rod but hande doesn't rotate ) with a bronze 44cal brush to clean out chamber at the range when shooting 5.56 steel case
Agreed, thanks TRG-42. The concept of using the charging handle to guage "stickiness" seems like a good one to me. Hey, anything that helps me run cheap ammo is welcome
Leviathan024
CGN Ultra frequent flyer
- Location
- GP Alberta
