New Direct Impingement .308 By POF

POF is breaking with their tradition of offering only oprod guns (aside from the straight-pull ReVolt) by introducing a new .308 Winchester direct impingement precision rifle. Calling it the “Olde School”, they are presenting the rifle as being more reliable and heat resistant, incorporating an Inconel gas tube and their four-fluted chamber neck. As of yet, POF has only released a single-page brochure for the Olde School, but they claim the rifle is shipping to customers presently:


Fortunately for us, has published a more detailed article on the rifle:

The Patriot Ordnance Factory, POF, is well-known for their hard-use, heavy-duty piston-driven AR-style rifles and uppers in 5.56 and 7.62 NATO, but they’re doing something a little different for 2015. They’re going “Olde School” with direct-impingement rifles chambered for .308 Winchester/7.62 NATO.

Still, this is POF, even the gas system is going to be improved. Although these rifles are direct impingement, they have a 3-position gas block and a straight Inconel gas tube. Inconel belongs to the exotic “superalloy” family of materials and is extremely resistant to both heat and pressure; it’s just perfect for an enhanced gas tube.

These new rifles are still built to the same standards as existing POF guns and promise “relentless reliability” along with many features and improvements not seen on standard direct impingement rifles including an adjustable gas block like the one used for their piston guns.

Olde School rifles bring everything that their piston rifles have to the table including the E2 semi-fluted chamber for enhanced extraction, one-piece M-Lok handguard that runs the entire length of the upper receiver and fully-ambidextrous controls, including bolt catches on both sides.

The E2 chamber is unique to POF rifles. The neck has small flutes to allow gas from burning powder to unseal the spent case from the chamber before it is ejected. This leads to better extraction and improved reliability, even when thing start to foul up. The flutes are still small enough that they don’t cause a lot of case deformation, either, which is a plus for reloaders.

In addition to having truly ambidextrous, precision machined billet receivers, the Olde School lowers have anti-rotation pins for the fire control group, ensuring that the trigger is consistent pull after pull.

The Olde School is offered with 14.5-, 16.5- and 20-inch barrels and the barrels are topped with hearty 3-baffle muzzle brakes with integral standoff devices. Additionally Olde School guns are offered with a standard black or optional nickel-boron NP3 finish.

The handguard accepts all M-Lok accessories but still has two short sections of Picatinny rail at the front of the handguard, one for grips or bipods, and a small top rail for a front sight or weaponlight mount.

Even with its overbuilt rails and rugged design, these .308s still manage to weigh in at around 8 pounds, and just a bit more for the 16- and 20-inch models.

Of course, POF rifles don’t come cheap, and these Olde School guns have a suggested retail price of $2,599. Real-world prices are usually lower, but even then, these guns fetch a premium.

Whether this was the rationale behind the Olde School or not, it has become increasingly obvious that oprod systems offer only a lower-residue firing cycle than DI. This is attractive enough to buyers and designers alike that oprod weapons are certainly not going away, but neither are DI rifles, either.

Nathaniel F

Nathaniel is a history enthusiast and firearms hobbyist whose primary interest lies in military small arms technological developments beginning with the smokeless powder era. In addition to contributing to The Firearm Blog, he runs 196,800 Revolutions Per Minute, a blog devoted to modern small arms design and theory. He is also the author of the original web serial Heartblood, which is being updated and edited regularly. He can be reached via email at


  • Zachary marrs

    “Relentless reliability”

    “Hard use”

    Didn’t know POF knew those words

    DI? really? Son, i am disappoint

    Im not even gonna start on the fluted chamber

  • BattleshipGrey

    How’s about some “olde school” pricing?

    • Ben


  • Ben

    It’s a step back in evolution, but if there is a buyer then I can’t blame POF for wanting to make a buck.

    • CommonSense23

      How is this a step back in evolution?

      • Ben

        POF is one of the leaders in piston driven AR manufacturing and for them to now devote time and resources to the inferior direct impingement system just seems like a step back, but that is just my opinion. I know there are plenty of DI AR owners out there, I’m even one of them, and POF is probably just trying to broaden its customer base which there is nothing wrong with that. I also have a piston driven AR from another manufacturer and I’m about to get a few more, maybe even the POF GEN4. My DI AR has basically just been collecting dust the past few years. To me it is like going from a bolt action rifle to a flintlock.

        • CommonSense23

          Except how is a DI system inferior? The only reason Op Rod systems are popular these days is people not understanding why the HK416 ever came into existence.

          • Ben

            In my experience when I pull the trigger on any piston driven system I don’t have the feeling of hesitation of wondering if the gun will fire or not. Unfortunately with direct impingement systems I do. If you like DI systems then that is fine and all the power to you. Personally I just don’t trust them especially if I am ever in a situation where my life is dependent on the DI system.

          • CommonSense23

            Having a Op Rod has nothing to do with the gun firing. You still haven’t explained why a DI is less reliable. Cause every major test that the SF groups do find no advantage of going to a Op Rod.

          • Ben

            DI is less reliable because a lot of the crap that comes out of the shell ends up in my receiver fouling up just about everything. As a result the gun jams, misfires, stovepipes, ect…. My piston driven AR runs flawless probably because the receiver is not used as a dumping ground for debris. As an extra bonus my piston driven AR runs through the cheap steel case whereas my DI AR would hang up every 3-4 shots of steep case ammo. If a DI AR works for you then great. I’m not trying to sell you on the piston driven system. I am just sharing my experience.

          • CommonSense23

            A properly in spec DI system should need to replace parts before you ever need to clean it. Even if you run a DI with no lube what so ever you should get over 2000 rounds before it starts failing due fouling, and even then it just needs lube. If you are having misfires, stovepipes, those are not issues with fouling, but either a improperly designed and built AR, or a improperly maintained one, that needs the wearable parts maintained. Same a as Op Rod driven gun.

            If you take a quality Op Rod driven AR and a quality DI AR, and run the same amount of rounds thru them, the guns are going to start having the same sorts of malfunctions at the same rate. Extractors, ejectors, locking lugs are all going to fail at the same rate. This has been proven by multiple test of the two systems.

          • Ben

            These “proven tests” you mention just don’t represent my experience with the two platforms. Ruger has a solid and long reputation in the gun world and when they decided to get into the AR-10 market they totally bypassed the DI system and went straight to the piston driven system. The result is the SR762 (which is my next purchase). If Ruger thought the DI system was so great then why would Ruger intentionally not develop one of their own. Ruger does offer one model of a DI AR15 model vs. two piston driven AR15 models that they also offer. The price of the piston driven models is well over double than that of the DI model which means people are willing to pay more than double for a PD AR. I doubt people would pay way more for a PD AR if they thought it was the same or worse than a DI system. PD systems just basically run like AKs.

          • CommonSense23

            First all ARs have a piston. And people pay more for Op Rod driven rifles due to not understanding why they are buying them.

          • Ben

            To each his own.

  • mosinman

    *Gasp* didn’t they know DI will cause your rifle to gum up and jam within 5 shots? All of that evil carbon by the bolt is no goood.

  • If we introduce New Slurm we can market the old formula as Slurm Classic a few years from now and cash in!

  • JumpIf NotZero

    What’s olde is new again, apparently

  • Joshua

    In other words, our op rod driven guns aren’t selling well enough. Let’s make a DI and a whole bunch of wiz bang words to get the bubbas after them.

  • Treiz

    meh, not seeing a reason to lust after this instead of the GII. Would be nice if we could get a standard going in the .308 AR market.

  • Treiz

    meh, don’t see a reason to lust after this instead of the GII. It would be nice if we could finally get a standard in the .308 AR market.

    • Squirreltakular


  • n0truscotsman

    Why the full circle back to DI?

    According to fans, POF’s gas piston was the next best thing to something drawn up by john moses browning…

    • CommonSense23

      Cause the strengths of a DI system outweighs that of a OP Rod in a AR.

  • guest

    I fail to see novelty and innovation when time after time the AR-10/15 gets recycled over, and over and over again ad nauseum with only actual alterations being the visual/design aspects of the rifle. And (of course!) every time yet another – among thousands – clone pops up then it’s “new” and “improved”. Improved how? IMHO the biggest innovation lately has been Keymod. A really nifty, smart way of addressing modularity, and most importantly doing away with some weight and machining time. Besides that I can’t point at any real innovation in the ENTIRE world of AR rifles.

    I’d like to be proven wrong, no irony intended.