Glock 43X Hush Puppy — Model 2 Suppressor, Slide Lock & Holosun 407K

Product Description

Glock 43X Hush Puppy at a glance

• What it is: A complete suppressed Glock 43X — pistol, suppressor, threaded barrel, optic and sights in one package, not a parts list you assemble yourself.
• Slide lock: The Hush Puppy slide lock lever holds the slide closed on firing, so gas and mechanical cycling noise never leave the ejection port. This is what separates a Hush Puppy from an ordinary threaded Glock.
• Suppressor: Includes the compact Hush Puppy Project Model 2 — the pill-sized 9mm can built around subsonic ammunition.
• Barrel: 3.92-inch threaded barrel in 1/2×28, the standard 9mm thread pitch.
• Optic and sights: Holosun 407K red dot on the G43X MOS optic cut, with suppressor-height iron sights that clear the can.
• Finish: Black Cerakote by Shark Coast Tactical. Also built in FDE — same package, same components, different colour: see the Glock 43X Hush Puppy in FDE.
• Capacity: 15 rounds.
• What buying one involves: The suppressor transfers on a BATFE Form 4 with a background check and registration. The tax stamp is $0 under the OBBBA. Western Sport is a Type 07 FFL/SOT and files the paperwork in house.

The Glock 43X Hush Puppy is a complete suppressed-pistol package: a Glock 43X SLIMLINE 9mm with a 3.92-inch threaded barrel, suppressor-height sights, a Holosun 407K red dot on an optic-cut slide, black Cerakote by Shark Coast Tactical, and a suppressor. It is the shortest path from wanting a suppressed carry-size 9mm to owning one, because every part of the system was selected to work together.

Most people who go looking for a suppressed Glock 43X end up assembling it themselves: buy the pistol, source a threaded barrel, replace the sights so they clear the can, add an optic, then shop for a suppressor separately. This package removes all four of those decisions and the fitment risk that comes with them.

Key Facts

• Platform: Glock 43X SLIMLINE, 9mm Luger
• Barrel: 3.92-inch threaded barrel
• Sights: Suppressor-height sights, so you keep a usable sight picture over the can
• Optic: Holosun 407K on an optic-cut slide
• Finish: Black Cerakote by Shark Coast Tactical
• NFA: Suppressor included — Form 4 transfer, $0 stamp under OBBBA
• MPN: UX4350204NR15

What It Takes to Suppress a Glock 43X

Three things have to be true before a Glock 43X will run a suppressor properly, and a stock 43X has none of them.

First, the barrel has to be threaded. The factory 43X barrel is not, so it has to be replaced. Second, the sights have to be tall enough to clear the suppressor body, or you lose your sight picture entirely the moment the can is mounted. Third, you need the suppressor itself, which is a Form 4 item on its own timeline. This package covers all three.

A subcompact slide also has less mass to work with than a full-size gun, so pairing the right can with the right pistol matters more here than it does on a Glock 19 or 17. That pairing is the reason to buy the package rather than assemble it piece by piece.

Suppressed Glock 43X for Carry and Home Defense

A suppressed 9mm is not quiet the way movies suggest, but it is hearing-safe in most configurations, and indoors that is the whole argument. An unsuppressed 9mm fired in a hallway will damage your hearing permanently in one round.

The 43X frame is the reason this configuration appeals to carriers rather than just range shooters. It is a slim, full-grip pistol that hides well, so the host gun is one you would carry anyway. If you are still choosing between models, our Glock 43 vs Glock 43X comparison covers the grip and concealment trade-off, and our guide to the best suppressor for a Glock 43X walks through the can options if you would rather build it yourself.

Ordering from Western Sport

Order online and we ship it to the licensed FFL dealer you choose near you — see how buying a gun online works. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message.

Why a Tilting-Barrel Pistol Needs a Booster

This is the part most people get wrong when they suppress a pistol for the first time, and it is worth understanding before you order.

A Glock 43X is a short-recoil, tilting-barrel design. When it fires, the barrel and slide travel back locked together for a short distance, then the barrel tilts down and stops while the slide keeps going. That unlocking movement is what cycles the gun.

Hang a suppressor on the muzzle and you have just added several ounces to the end of the barrel. That extra mass resists the rearward movement the action depends on, and the pistol short-strokes: failures to eject, failures to feed, or it simply does not cycle at all.

The fix is a booster, also called a Nielsen device or a linear inertial decoupler. It sits in the rear of the suppressor and lets the can stay put for the first fraction of an inch while the barrel unlocks normally, then catches up. It decouples the suppressor’s mass from the barrel at exactly the moment the mass would cause a problem.

Rifles do not need this. An AR-15 barrel is fixed and the gas system does not care what is on the muzzle. Fixed-barrel pistols do not need it either. Tilting-barrel pistols — Glocks, SIGs, most modern semi-autos — do.

A suppressor sold for rifle use will not have a booster in it. Fitting one to a Glock without the right piston assembly is the single most common reason a suppressed pistol will not run.

What Is In This Package

The pistol

• GLOCK 43X, 9mm, slimline frame
• 3.92in threaded barrel by Shark Coast Tactical, black Cerakote — replaces the shorter factory barrel so there is thread to mount to
• Suppressor-height sights, so you keep a usable sight picture over the top of the can

The optic

• Holosun 407K — compact red dot sized for the slimline Glock footprint

The suppressor

• Included in the package price. Transfers on its own ATF Form 4, separately from the pistol

Buying these four pieces separately is the usual route, and it is where people end up with a barrel whose thread pitch does not match the can, or sights too short to see over it. This package is specified to work together out of the box. Send us a message if you want the exact suppressor model and thread pitch confirmed before you order.

Frequently Asked Questions

Q: Can you put a suppressor on a Glock 43X?

A: Yes, but not on a stock one. A Glock 43X needs a threaded barrel and suppressor-height sights before it will run a can usefully, because the factory barrel is unthreaded and the factory sights disappear behind a suppressor. This Hush Puppy package includes the threaded barrel, the taller sights and the suppressor together.

Q: Does this Glock 43X package include the suppressor?

A: Yes. The suppressor is part of this package, which is why the purchase goes through an ATF Form 4 rather than a normal handgun transfer.

Q: Do I need a tax stamp to buy a suppressed Glock 43X?

A: Yes, an approved ATF Form 4 is required before you can take possession of the suppressor. The stamp itself is $0 under the One Big Beautiful Bill Act. The pistol portion transfers on a standard Form 4473 like any other handgun.

Q: Why does a suppressed Glock 43X need suppressor-height sights?

A: A suppressor body sits directly in front of and above the muzzle, and it blocks standard-height iron sights completely. Suppressor-height sights are tall enough to see over the can, so you keep a usable sight picture with the suppressor mounted and still co-witness with the red dot.

Q: Is a Glock 43X too small to run suppressed?

A: No, but the pairing matters more than it does on a full-size pistol. A subcompact slide has less mass and a shorter cycle than a Glock 19 or 17, so the suppressor and the pistol have to be matched to keep the gun cycling reliably. That matching is the reason to buy a built package rather than assemble parts.

Q: How long does the Form 4 take, and can I shoot the pistol while I wait?

A: You take possession of the suppressor only after the ATF approves the Form 4; see our NFA wait times guide for current approval times.

Still deciding which can to run? Our guide to the best suppressor for a Glock 43X compares the 9mm options that actually cycle a subcompact slide reliably, and explains why the threaded barrel and suppressor-height sights are not optional on this pistol.

Additional information