JK Armament HUB Piston Mount, 9mm, 1/2×28

The JK Armament HUB Piston Mount lets a suppressor ride separately from a moving 9mm pistol barrel, keeping short-recoil-operated semi-autos like Glocks and SIGs cycling reliably once a can is attached (JK Armament part no. JK155HPM28BN). It installs in place of a JK 155 suppressor’s taper mount or other mount accessory, threading directly into the base of the serialized suppressor tube using the HUB-standard 1-3/8-24 (1.375-24) thread pitch. This also makes it compatible with any other suppressor on the market that uses HUB threads and has enough internal length (roughly 1.8 inches) to accommodate the booster housing. It threads onto a 1/2×28 pistol muzzle.

Key Specifications

• It is threaded 1/2×28, matching common 9mm pistol muzzle threads.
• It functions as a piston mount, isolating the suppressor’s weight from the moving barrel so short-recoil pistols keep cycling reliably.
• It uses the HUB-standard 1.375-24 thread pitch, threading into the base of the serialized suppressor tube.
• It is compatible with any HUB-threaded suppressor with roughly 1.8 inches of internal length for the booster housing, not just JK’s own cans.
• It is built from aluminum and nitride-finished stainless steel components.

Frequently Asked Questions

Is this itself a suppressor or NFA item? No. This is a Title I accessory (a mount or muzzle device) that a suppressor threads onto or connects with; it is not a regulated suppressor itself and does not require an ATF Form 4 to purchase.

Why does a suppressed pistol need a piston mount? Adding suppressor weight to a short-recoil pistol barrel can slow or short-stroke the action; a piston mount isolates that weight from the moving barrel so the pistol cycles reliably.

Is this compatible with suppressors other than JK’s own? Yes, it works with any suppressor using HUB (1.375-24) threads that has enough internal length to accommodate the booster housing.

Buy the JK Armament HUB Piston Mount, 9mm, 1/2×28

Order it directly from our Lubbock, Texas gun shop for fast, insured shipping to your door. Shop the full JK Armament lineup and browse our Class 3 parts and accessories selection for more build components.