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Best AR9 Parts? - Aero EPC-9 (DTT Warship)
Updated
6 months ago
Good morning, everyone, this is John with gun.deals, today we're going to be taking a look at the Delta Team Tactical Warship upper receiver kit, this is basically a complete kit minus the lower receiver for a pistol caliber carbine. This one specifically is based off of the fairly new Aero Precision EPC 9 kit, which has a few interesting things going on with the upper receiver, which we'll get into a little bit later on.
Full disclosure on the Delta Team Tactical Warship kit is that they did send this out to me for free to review, no ammunition or money or anything else like that, but just keep in mind that they did send out the kit tome for free so I didn't pay for it whatsoever.
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Getting into the full parts list for the Delta Team Tactical Warship build, starting out front we have what looks to be a KAK flash can for a muzzle device. The barrel is a 6-inch what they call an ELD performance barrel, which is just a rebrand of somebody else’s barrel, not sure who the exact OEM is, it is a 6-inch middleweight profile barrel for a 9 mm, really good ballistics out of a 9mm cartridge, really short, really handy, does basically everything you want it to do.
The flash can allows a lot of the blast to be redirected down range, not a lot of blast on 9 mm, but on this build specifically also allows you to have a little bit longer of a handguard and not blow your fingers off by putting them a little bit too far forward, so the flash can is not a bad idea on this build, though I would ideally at some point in the future swap it out with a 9 mm suppressor.
The barrel itself is 4150 chrome moly vanadium steel, has a 1-10 twist rate, 6 inches overall length, and it is in 1/2x36 thread pitch, which is more of a 9mm centric thread pitch, just to make sure that you don't accidentally put on like a 5.56 flash hider on there and rearrange the end of your barrel.
The handguard on this build is an incredibly simple rail, it's what they call the kickback rail, it is 7 inches long M-LOK on the 3, 6 and 9 o’clock, full pick rail on top with some cuts for ventilation, it's a very lightweight, very slim rail, no issues there, and the lockup is just two clamp bolts on the bottom steel into aluminum, incredibly simplistic, incredibly cheap and realistically at most you're probably putting a light on this rail, so as far as that goes for its intended purpose it gives you enough space to put your hand on it, maybe a light, and that's about it, but for a 9mm PCC that's just about all you need.
Getting into the upper receiver, this is where things get interesting, this is based off of the Aero Precision EPC 9 or their enhanced pistol caliber 9, which is basically a slight redesign of a standard 9 mm AR-9 upper receiver. The most interesting facet about it is that it does come with a bolted on last round bolt hold open, which essentially amounts to a bent piece of steel that fits on the inside of the upper receiver, winds its way to the outside and fits just underneath your bolt release paddle. What that does is when your magazine runs out, your Glock magazine in this case because we are actually using this on a Aero Precision EPC 9 lower as well, when your Glock magazine runs out it will lift up on the inside of that bent piece of metal, which will then in turn push against your bolt release paddle, meaning that when you insert your new magazine, the only thing you have to do is hit that bolt release just like a standard AR-15 . Most AR-9s do not have a last round bolt hold open so that is an objective improvement, it does shorten up your reload times and does also give you a more familiar training regimen, it's the same sort of manual of arms that you'll get on an AR-15, so if you do want to use it as a training upper or just have the same ergonomics between your different guns it does achieve that goal.
At the end of the day it is just a piece of twisted metal that's bolted on to the outside of your upper receiver, but it does work if it's a little bit inelegant. The rest of the upper receivers is perfectly fine 7075, it is a forged upper receiver, though the machining work on it from Aero Precision is nice, the lines are a little bit more aggressive, it is designed for 9 mm so you're not going to be sticking this on like a 5.56 or really anything else other than 9 or 40 and I believe they make a different upper receiver for different pistol calibers.
This is just a basic blowback 9mm so the bolt carrier group is just a heavy slab of metal that is cut for 9 mm and works with Glock mags, it is very simplistic, very rudimentary, but it does work. This one here does have the extra weight put into the back, some of them don't, some of them you can tune a little bit, but in this case this is just an incredibly simple heavy bolt meant to slow down the action enough for the case to have safe pressures inside after you ignite the primer, which is a nice feature to have if you're not into OODs.
The charging handle in this case is perfectly fine, it's just a mil-spec 7075 aluminum charging handle, absolutely nothing wrong with that. The rest of the build kit is just a very mil-specish lower parts kit and buffer tube. This one here came with a pistol buffer tube, which I swapped out for a carbine buffer tube because this is sitting on an SPR lower so I'm going to take advantage of that. One other difference on this build is that the trigger is the Hyper-fire EDT, the enhanced duty trigger, it is essentially a mil-spec plus, it's still about 5 1/2 to 6 pounds, but it's a very, very smooth pull, a little bit of creep, and a very, very short forced reset, very similar to a mil-spec trigger, very, very similar to like a polished mil-spec trigger if you will, but just a little bit nicer.
I should mention that this was assembled by Delta Team Tactical and I haven't really touched it, which is a good thing, we'll get into that in just a minute. I have had issues with their assembly in the past with different things going wrong on it, however, on this build which is a 9mm blowback, no gas block, no gas tube, nothing like that, it was actually assembled properly. The handguard screws, the barrel nut, all of that was torqued appropriately from the factory, everything else came perfectly fine, no issues with the lower parts kit or anything that they shipped with it, and on top of that, a nice touch in the bag is they did give about 30 cases of spent 9 mm, which I can only assume was test fired through this upper receiver. Keep in mind that they were sending me this upper receiver for review so I'm not sure if that's something that they'll do for everybody, but mine had about 30 spent shell casings in the bag with it.
Getting into reliability through about 400 rounds of mixed 9mm ammunition, blowback 9 mm is incredibly simple in terms of an operating system and fortunately usually is fairly reliable. This one here was 100% reliable with good magazines, I did have one issue on the very last round that I was supposed to fire with a UTG polymer mag, it didn't feed the very last round, so I'm not really going to hold it against the upper receiver since the polymer mags don't always feed very well, let's say I've had issues with the magpull and the UTG polymer mags, so not really going to hold that against the system and through the rest of it, it was flawless.
Accuracy, keep in mind that when I say mixed 9 mm ammunition I mean mixed into one tub, and so I had four rounds in the same hole atabout 25 yards and one round about a half inch to an inch away. That very well could have been then an instance where I had 415 grain from one brand and then I get a different brand 124 grain mixed in there because it was all mixed together in my 9mm tub.
Going forward on this build, there are a few things that I'd like to change. Number one, I'd really like to run this suppressed with a 9mm suppressor, which means that I need to go about the year-long process of getting another one, and I would also like to try out some different buffer systems. I know recently a couple different manufacturers have come out with some “delay systems” for blowback 9 mm that are supposed to make them a little bit more pleasant, while 9 mm do not have a ton of recoil, they tend to have their recoil over a very, very short period of time making them feel very snappy, so I think I would like to try out some different recoil mitigation systems.
That's about all that I got for you on the Delta Team Tactical Warship set and of the Aero Precision EPC 9 upper receiver, it's definitely high value, it's definitely high fun, and it's definitely not very useful when it comes to actual like practical applications. However, if you're looking for a fairly high value 9 mm PCC based on the AR platform the Aero EPC 9 is a good way to go, takes Glock mags, does all the things fairly reliable, and fairly cheap to shoot and actually use.
