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Griffin's ATM line stands for Advanced Threaded Match, and this Glock 17 barrel earns the name. It's built from 416R pre-hardened chromium stainless steel, cut to tight tolerances so it drops into your Gen3 or Gen4 Glock 17 the same way your factory barrel does. Griffin puts two years of development into the fitment on these, and the goal was simple: gain accuracy and suppressor compatibility without giving up the reliability you already trust from a Glock.
The muzzle is threaded 1/2×28, which is the standard pitch for 9mm cans and comps, so you're ready for whatever you want to hang off the end. It runs a 1:10 twist with broach cut rifling for a uniform bore, a target crowned muzzle, and a 9mm SAAMI-spec chamber that's honed and polished for smooth feeding and ejection across everything from cheap range plinkers to defensive loads. The black nitride finish shrugs off wear and corrosion and adds surface hardness, so it holds up over the long haul.
The standout here is the included Micro Carry Comp (MC2). It's a compact, low-signature compensator that keeps a slim profile, so it fits a wide range of holsters without cutting or modification. It torques on at 8 ft-lbs (a dab of thread locker like Rocksett keeps it put, no set screws needed) and delivers a real reduction in muzzle rise and felt recoil. It won't turn a 9mm into a rimfire, but the flatter recoil helps you get back on target faster for quicker follow-up shots.
Griffin Armament is a combat veteran-owned shop out of Watertown, Wisconsin, best known for suppressors, and that background shows in the machining and finish work. Overall length runs 5 inches, or 5.26 inches with the comp installed. If you're building out a Glock 17 for a suppressor host, a competition rig, or a range gun with a little extra flatness, this is a clean, capable upgrade that installs in minutes.
It's cut specifically for the Gen3 and Gen4 Glock 17. Griffin machines these to drop into your slide the same way the factory barrel does, so no gunsmithing is required. If you run a Gen5 Glock 17, you'll want the Gen5-specific ATM barrel instead.
Feedback across users is consistent that it takes the edge off muzzle rise and helps you get quicker follow-up shots. It's not going to make a 9mm feel like a .22, but the flatter recoil is noticeable at the range. Because it stays low-profile, it also fits many holsters without any modification.
The muzzle is threaded 1/2×28, the standard pitch for 9mm suppressors and muzzle devices. That means you can swap the included Micro Carry Comp for a can or another comp whenever you want. Just confirm your suppressor uses a 1/2×28 direct-thread mount or the correct piston.
The comp torques on at 8 ft-lbs. A thread locker such as Rocksett is recommended to keep it secure, and it doesn't rely on set screws to stay in place. The barrel itself installs like any drop-in Glock barrel, so the whole swap takes just a couple of minutes.
| UPC | 791154083369 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | GAG17G4TB |
| Product Type | Barrel |
| Model | |
| Barrel Length | 5" |
| Caliber/Gauge | 9mm |
| Color | Black |
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