clearcut
Member
I've been told to run it wet but how wet ? clp? it's a direct impingement.
Thanks CC
Thanks CC
No, its not. Its actually piston driven, but the piston has been moved to inside of the BCG.it's a direct impingement.
I have wondered about this as well. If you glaze the BCG the way some advise, then isn't there a risk of oil contamination for the top round in the mag? I rely on my M4 for HD, and I've wondered if that is a risk worth worrying about.I've been told to run it wet but how wet ? clp? it's a direct impingement.
Thanks CC
Not to get sidetracked, but I have been seeing this "correction" frequently. Can't we agree that when someone refers to a "DI" gun, it is to differentiate between it and the various "P" guns that are now becoming so popular on the AR front? Maybe a new acronym would be better; the heavier, more complicated but less crap in the receiver version (THMCBLCITR) vs the lighter, less complicated, more crap in the receiver version. (LLCMCITR)No, its not. Its actually piston driven, but the piston has been moved to inside of the BCG.
See:
I've never cleaned my AR's, just oiled them in the 6 key locations:
Cam pin
2 lower rails
2 upper rails (easily missed, on the side of the gas key)
Gas rings (drip oil on the vent holes and work the bolt back and forth to suck it in)
Never had any issues! And I use Fireclean.
Not to get sidetracked, but I have been seeing this "correction" frequently. Can't we agree that when someone refers to a "DI" gun, it is to differentiate between it and the various "P" guns that are now becoming so popular on the AR front?
Its called 'gas impingement' or the Stoner Gas System. Which is different from 'Direct Impingement'Maybe a new acronym would be better; the heavier, more complicated but less crap in the receiver version (THMCBLCITR) vs the lighter, less complicated, more crap in the receiver version. (LLCMCITR)
Eugene Stoner said:″This invention is a true expanding gas system instead of the conventional impinging gas system.″
OK, not to get completely off of oiling, but meanings do change with usage. What Stoner phrased 50 years ago does not take into account common CURRENT vernacular. From the Daniel Defense website:No. Words mean things. Its like calling a 1911 'blowback' when it operates from a locked breech.
Its called 'gas impingement' or the Stoner Gas System. Which is different from 'Direct Impingement'
Back on topic: You JUST need enough oil to:
a) Stave off corrosion on non-coated parts
b) Keep metal-on-metal parts moving with limited friction.
Which is not a lot of oil. A thin film will work fine.
Remington calls the magazines that come with its 770-series rifles 'clips'OK, not to get completely off of oiling, but meanings do change with usage. What Stoner phrased 50 years ago does not take into account common CURRENT vernacular. From the Daniel Defense website:
GAS SYSTEM: Pinned Low Profile Gas Block CNC Machined of 4140 hardened steel with Mil-Spec Heavy Phosphate Coating, Carbine Length, Direct Impingement
OK. If DI applies to only those designs whereby gas directly cycles the bolt, then an AK47 is actually a DI gun; as the piston and the bolt are a single unit, while the SKS is a piston actuated gun since the piston actuates a transfer bar that then strikes the bolt rearward, correct? I'm just trying to display the usage of terms in contrasting a traditional piston" gun like the AK, with the traditional DI AR.Remington calls the magazines that come with its 770-series rifles 'clips'
Just because they are a company doesn't mean they are correct.
The Remington 7400 is direct-impingement. The gas hits the bcg directly and causes motion in a linear fashion.
The AR works like a while different animal. It feeds the gas INTO the bcg, where it uses it to hold the bolt against the breech while simultaneously expanding to move the carrier backwards to unlock the bolt.
While the carrier moving, the gas rings are scraping the inside of the BCG, removing any fouling built up on the walls where the bolt runs.
When the carrier is moved back enough, the gas is vented, along with any crap that the rings had scraped off.
Then the momentum gained by the carrier cycles the bcg.
It truly is a self-cleaning design that almost perfectly mirrors the workings on an internal combustion engine.
Theres like 50 things going on in an AR's operation that is much more complicated than 'gas pushes carrier backward, pulls bolt, unlocks, and cycles'
Actually the piston is attached to the carrier, the opposite of an AR, where the piston is the bolt.OK. If DI applies to only those designs whereby gas directly cycles the bolt, then an AK47 is actually a DI gun; as the piston and the bolt are a single unit,
Correct, just like in piston AR's, the piston is spring loaded and hits the carrier to cycle the bolt.the SKS is a piston actuated gun since the piston actuates a transfer bar that then strikes the bolt rearward, correct?
But they're all different.I'm just trying to display the usage of terms in contrasting a traditional piston" gun like the AK, with the traditional DI AR.
I am by no means an expert, but I learned from one. I do the same as the quoted post.I've never cleaned my AR's, just oiled them in the 6 key locations:
Cam pin
2 lower rails
2 upper rails (easily missed, on the side of the gas key)
Gas rings (drip oil on the vent holes and work the bolt back and forth to suck it in)
Never had any issues! And I use Fireclean.
I've never cleaned my AR's