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The Lead & Steel LS9MM16-36 is a 16-inch, 9mm barrel made for AR9 and 9mm AR-style builds, and it hits that sweet spot between rugged materials and a straightforward straight-profile design. It runs a 1:10 twist rate, which does a nice job stabilizing the full spread of common 9mm bullet weights you're likely to feed it, from lighter 115 grain range fodder up to heavier defensive loads. If you're piecing together a pistol caliber carbine and want a barrel that just works without a lot of fuss, this one belongs on the short list.
This barrel is turned from 4150 chrome moly vanadium steel, which is the material a lot of builders look for because it handles heat and sustained shooting better than the cheaper 4140 alternatives you'll run across. On top of that, it gets a QPQ black nitride treatment that hardens the surface and adds real corrosion resistance inside and out. The straight profile gives it a classic look and adds a bit of weight up front, which many folks like for keeping a 9mm carbine steady on target.
The model number tells the story here: the -36 designates a 1/2 x 36 thread pitch at the muzzle, which is common on 9mm AR barrels. Worth knowing before you order muzzle devices, since it's a different pitch than the 1/2 x 28 you'd find on a 5.56 barrel. One important tip that applies to any 9mm barrel: never install a .223/5.56 flash hider on it, because those don't have enough bore clearance for a 9mm round to pass. Before you lock down a brake, flash hider, or mount, drop a round through the device to confirm the projectile clears freely.
This is a blowback-style pistol caliber barrel, so there's no gas system to fuss with, which keeps builds simple and reliable. Pair it with a quality 9mm bolt carrier group and a matched buffer setup and you've got the foundation for a smooth-running range gun, training rig, or competition PCC. It's designed to play nice with standard 9mm AR uppers, so it slots into most builds without drama.
The muzzle is threaded 1/2 x 36, which the -36 in the model number refers to. This is a common pitch on 9mm AR barrels and is different from the 1/2 x 28 pitch found on most 5.56 barrels. Make sure any muzzle device you pick matches this pitch before you order.
No. A .223/5.56 flash hider won't have enough bore clearance for a 9mm round to pass through it safely. Always confirm a 9mm round drops freely through any muzzle device before installing it, and stick with muzzle hardware made for 9mm.
The 1:10 twist stabilizes the common range of 9mm bullet weights well, including the popular 115 and 124 grain loads most people run. It also handles heavier defensive projectiles, so you're covered whether you're plinking, training, or shooting matches.
Yes, it's built for AR9 and 9mm AR-style builds and drops into standard 9mm AR uppers. Since it's a blowback design, there's no gas system to deal with. Pair it with a proper 9mm bolt carrier group and matched buffer for the smoothest results.
| UPC | 7427053012508 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | LS9MM16-36 |
| Length | 16" |
| Model |
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