If you've spent any kind of time trying out AR-9 builds, you've most likely realized that selecting a metalform colt 9mm magazine is the quickest way in order to fix feeding problems that plague nearly all pistol-caliber carbines. Generally there is something incredibly frustrating about visiting the range with the brand-new build, just to have it convert into a single-shot bolt action because your magazines can't keep up with the cycle rate. I've been there, and honestly, it's why I halted playing around with the particular "budget" options plus just stuck with what actually works.
Why the Steel Construction Really Matters
Many people getting straight into the 9mm AR world today are pushed toward Glock-pattern lowers because, nicely, all of us have Glock magazines lying around. Yet for those of us who else prefer the aesthetic and the straight-line feed of the original Colt SMG pattern, the metalform colt 9mm magazine could be the precious metal standard. These aren't those flimsy, thin-walled things you discover in the measurement bin. They are built from cold-rolled steel, and you can feel the weight and rigidity the second you pick one up.
The problem with plastic material or polymer mags within a Colt-pattern magazine well is that they tend to swell when they're fully loaded. In case the mag swells, it doesn't fall free. If it doesn't drop free, your reloads become a two-handed wrestling match. With these Metalform stays, that's never an issue. The steel remains exactly the exact same shape whether it's empty or packed with 32 times of 115-grain FMJ. Plus, let's become real, the stick-mag look just looks "right" on the subgun-style build.
The Magic is in the Feed Lips
If you ask any kind of gunsmith who specializes in the AR-15 platform about 9mm malfunctions, they'll almost always point to the feed lips. On many less expensive magazines, the give food to lips are possibly too soft—meaning these people bend over time—or they aren't shaped correctly to lead the round directly into the chamber in the right angle.
The metalform colt 9mm magazine uses the very specific geometry because of its feed lip area. They are reinforced and heat-treated to assure they don't distribute apart under springtime pressure. I've acquired some of these types of mags for years, dropped them upon concrete during exercises, and stepped upon them by incident, plus they still supply as reliably as the day I actually took them away of the plastic. Once the bolt company group comes ahead, it strips the round off the particular mag and sends it straight into the barrel without that annoying "ker-chunk" audio of a circular hitting the give food to ramp too low.
Let's Chat About the Follower and LRBHO
One of the biggest headaches with 9mm ARs gets the bolt to lock back for the last round. This might sound like a simple thing, but it's actually a mechanical nightmare to obtain right across various brands of decreases and uppers. The particular metalform colt 9mm magazine comes with a metal follower using a very specific tabs designed to engage the bolt capture.
I've attempted some of the polymer-follower magazines available, and while they work with the while, the plastic tab eventually models off. Once that will tab is long gone, your Last Circular Bolt Hold Open up (LRBHO) becomes a "maybe it will, maybe it won't" circumstance. Because Metalform uses a metal follower, that will contact point stays sharp. It strikes the bolt capture with authority all the time the mag operates dry. It's a little detail, but when you're shooting some sort of match or simply want your gun to function like it's supposed in order to, it's a large deal.
Suitability Across Different Platforms
Even though all of us call it the "Colt" magazine, these items work in the huge variety associated with firearms. Obviously, these are the go-to for the Colt 6450 and its modern descendants, but they also work flawlessly in Stone River Arms, CMMG (the older dedicated lowers), and actually the various mag-well connectors like those from Sylvan Arms or even Hahn Precision.
I really use a metalform colt 9mm magazine in a mag-block adapter I threw into a standard 5. 56 lower. Usually, individuals adapters are finicky as heck. Nevertheless, because the Metalform mags have like consistent external measurements, the adapter retains them perfectly. There's no side-to-side wobble, and the height is definitely exactly where this needs to be for that bolt in order to pick up the next round. If you're jumping between different builds, having a box of these types of mags means a person don't have to "this mag only works in that gun" nonsense.
Smashing Them In
I will say, if you get the brand new metalform colt 9mm magazine , the springs will be stiff. Like, "I think I'm likely to break my thumb" stiff. This is usually actually a good sign—it means the springtime tension is higher enough to maintain with high cyclic rates—but it can become a problem for the particular first few outings to the variety.
I usually recommend getting the Maglula Uplula loader. Seriously, don't actually try to load these types of to capacity by hand when they're new. After regarding five or six full load-and-unload process, the spring forms in perfectly. This stays strong enough in order to push that final round up to the path of the bolt, but this won't feel like you're fighting a hydraulic press just to get the particular 30th round within.
Comparing the Cost vs. Overall performance
You may definitely find 9mm mags for $15. You may even discover some for $10 if you're searching at the obvious plastic ones. Yet in my experience, those are "disposable" magazines. They're fine for an informal plinking session where you don't brain a malfunction each other mag, however they aren't something I'd trust.
The particular metalform colt 9mm magazine usually sits in that will $30 to $40 range, depending on where you see them. To some, that will feels pricey for a 9mm magazine, but you have to look at it as an extensive investment. I'd go for five mags basically 100% of the time than 10 mags that depart me clearing jams every couple of minutes. These types of are the exact same magazines that a lot of high-end manufacturers vessel with their $1, 500+ carbines, and there's a reason for that. They don't want the popularity of their weapon being ruined simply by a cheap magazine.
A Notice on Maintenance
Maintenance is pretty straightforward, which is an additional reason I including them. Since they're steel, you do want to keep a very lighting coat of essential oil on the outside if you live in a humid environment, simply to prevent any surface speckling. Every couple of months, or after the particularly dusty variety day, I'll take the floor plate off, pull the spring and follower away, and just wipe the inside from the entire body with a dry rag. You don't want to gunk up the inside along with oil—just keep this clean and dried out, and they'll operate forever.
The floor plates are furthermore removable, which is great if you need to add weighted basepads regarding competition or "pull tabs" for easier extraction from the chest rig. They follow the standard Colt pattern, so the particular aftermarket support regarding accessories is massive.
Final Thoughts from the Range
At the particular end of the particular day, the metalform colt 9mm magazine is really a strong piece of equipment. It's not fancy, it doesn't have fancy windows or even weird textures, however it feeds rounds to the chamber without crisis. In a planet where we invest hundreds of dollars upon optics, triggers, plus handguards, it seems silly to skimp on the one particular part that in fact moves the ammunition into the weapon.
If you're struggling with your AR-9, or in the event that you're just beginning a brand new build plus want to miss the "troubleshooting" stage, just grab a couple of these. They've already been the industry regular for decades for a reason. When you discover how much even more reliable your carbine is by using a correct steel magazine, a person probably won't want to go back to anything else. They just work, plus honestly, that's the best compliment I can give any item of firearm gear.