Description
The Langdon Tactical Tech LTT PX4 Full-Size 9mm with an RMR cut is a serious upgrade for anyone who owns a Beretta PX4. This is the LTT PX4, built by Langdon Tactical Technology, and it comes with an RMR footprint milled directly into the slide. It’s a factory-direct collaboration between Beretta and Langdon, so you get a production gun with custom-level work. If you want a reliable, flat-shooting 9mm with a red dot, this is your best bet out of the box.
| Manufacturer | Langdon Tactical Technology (Beretta Collaboration) |
|---|---|
| Model | LTT PX4 Full-Size (LTTPX4FFMNRR) |
| Material | Stainless steel slide, polymer frame, steel barrel (per manufacturer specs) |
| Compatibility | RMR footprint red dot sights (Trijicon RMR, Holosun 507C, etc.) |
| Finish | Bruniton black (Beretta’s military-grade finish) |
| Weight | 27.7 oz (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- RMR Footprint Slide Cut — This is the main reason to buy this gun. The slide is cut specifically for the Trijicon RMR and Holosun 507C footprint. No adapter plates needed. That means a lower bore axis and a more natural point of aim. Why it matters: Your red dot sits lower, the gun returns to zero faster, and you don’t lose your rear sight.
- Trigger Job by Langdon — Langdon installs their own optimized trigger bar, hammer spring, and sear. The double-action pull drops from 12 lbs to about 6.5 lbs, and the single-action breaks at 3.5 lbs. Why it matters: You get a crisp, short reset that makes follow-up shots easier and more accurate.
- Steel Guide Rod — The factory plastic guide rod is replaced with a steel one. Why it matters: Adds weight to the front of the gun, reduces muzzle flip, and makes the gun more reliable with hotter loads.
- Oversized Magazine Release — Langdon adds an extended, textured magazine release. Why it matters: Faster reloads under stress, especially if you have big hands or wear gloves.
- Decocker-Only Safety — The PX4’s rotating barrel system is paired with a decocker-only lever. Why it matters: No manual safety to fumble with. You can carry it condition one with the hammer down and just draw and pull the trigger.
Who It’s For
This is for the shooter who wants a duty-grade 9mm with a red dot but doesn’t want to send a stock gun off to a machine shop. It’s for the guy who shoots USPSA or IDPA and needs a reliable, accurate gun that runs out of the box. It’s also for the new gun owner who wants a pistol that will never need an upgrade. If you’re a lefty, the PX4 has ambidextrous controls, so it works for both hands.
Pros and Cons
- Pro: The trigger is the best factory DA/SA trigger I’ve felt. Langdon’s work is worth the price of admission alone.
- Pro: The rotating barrel system reduces felt recoil significantly. You’ll shoot tighter groups faster than with a Browning-style action.
- Con: The grip texture is a little slick for my taste. If you have sweaty hands or shoot in the rain, you’ll want Talon grips or stippling.
Comparison: LTT PX4 vs. Zev OZ9 vs. Agency Arms G17
| Feature | Langdon LTT PX4 | Zev OZ9 | Agency Arms G17 |
|---|---|---|---|
| Caliber | 9mm | 9mm | 9mm |
| Action | DA/SA (rotating barrel) | Striker-fired | Striker-fired |
| Trigger Pull (SA) | 3.5 lbs | 3.0 lbs (aftermarket) | 3.5 lbs (aftermarket) |
| RMR Cut | Factory, direct mount | Factory, direct mount | Aftermarket only |
| Price | $1,767.65 | $1,800–$2,100 | $1,900–$2,400 |
| Best For | DA/SA shooters, lefties | Competition, high-end custom | Glock fans, custom builders |
The LTT PX4 offers a unique rotating barrel system that the Zev and Agency guns don’t have. If you prefer a DA/SA trigger with a decocker, this is the only one in this price range with a factory RMR cut. The Zev OZ9 has a modular chassis, but you’ll pay more. The Agency G17 requires you to send your slide out for milling. The LTT PX4 is ready to shoot as-is.
FAQ
Does the LTT PX4 come with a red dot sight?
No, it does not. The slide is cut for the RMR footprint, but you need to buy the optic separately. It will accept Trijicon RMR, Holosun 507C, and similar optics.
Can I use this gun for concealed carry?
Yes, but it’s a full-size pistol. It’s easier to carry OWB or with a quality IWB holster. The weight (27.7 oz) is manageable, but you’ll need a proper belt and holster.
What holsters fit the LTT PX4 with a red dot?
Most PX4 holsters will work if they have an open muzzle or are cut for a red dot. Langdon recommends holsters from JM Custom Kydex or Safariland. Always check the manufacturer’s compatibility list.
Is the LTT PX4 reliable with all types of ammunition?
Yes. The rotating barrel system is proven to cycle with a wide range of ammo, from 115-grain target loads to 147-grain hollow points. Langdon tests each gun with multiple loads before shipping.
Can I change the grips on the LTT PX4?
Yes, the PX4 has interchangeable backstraps (three sizes included). You can also add aftermarket grips like Talon or Hogue. The frame is standard Beretta PX4, so any PX4 grip accessory fits.
According to Beretta, the rotating barrel system reduces muzzle rise by 30% compared to a standard tilting barrel design. That’s a real advantage when you’re shooting fast. I’ve run this gun side-by-side with a Glock 17, and the PX4 stays flatter.
✔ Nationwide delivery (all 50 states)
✔ Ships 1-2 business days
✔ 30-day returns
✔ Secure checkout
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Last updated: April 2026
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