Master Airbrush Spray Gun Adapter MPS-840 — Converts Iwata Gravity Cup to MPS Disposable Liners, 19 BSP Fit

The Master Elite Paint System MPS Spray Gun Cup Adapter MPS-840 converts compatible Iwata and select spray guns to use Master Elite's disposable MPS cup liners and lids.

If you want to skip cleaning metal gravity cups and streamline refills, the MPS-840 adapter threads into the gun’s gravity cup mount to accept the Master Elite disposable cup liner system. Machined for a 1/4" male connection with 19 BSP threads, this adapter is built to fit Iwata Supernova LS400 and WS400 models, the Iwata AirGunsa AZ3 HTE 2, and several other spray guns with matching gravity cup threads.

How does the MPS-840 adapter change my spray setup?

Installing the adapter replaces the gun’s standard gravity cup connection with a port that accepts the Master Elite disposable lid and liner system. That lets you use single-use liners that snap into the adapter and lid assembly, removing the need to wash traditional metal cups between color changes.

• 1/4" male adapter with 19 BSP thread for a secure fit
• Milled construction for smooth threading into the gravity cup mount
• Compatible with Master Elite MPS disposable lids and liners
• Quick changeover between colors without solvent cleaning

Will this adapter fit my Iwata Supernova or AirGunsa spray gun?

The MPS-840 was designed specifically to match the gravity cup thread pattern used on Iwata Supernova LS400 and WS400 guns as well as the Iwata AirGunsa AZ3 HTE 2. If your gun uses the same 19-thread BSP gravity mount, the adapter will thread in and allow use of the MPS cups.

• Confirmed fit: Iwata Supernova LS400 and WS400
• Confirmed fit: Iwata AirGunsa AZ3 HTE 2
• Check your gun's gravity cup thread spec (19 BSP) before ordering
• Works with other models that share the 19-thread BSP gravity mount

What operational benefits come from using the MPS disposable cup system?

Switching to disposable liners reduces time spent flushing cups, lowers solvent use, and minimizes paint waste during color changes or short runs. The adapter lets you keep your existing spray gun while tapping into those time and cost savings with the Master Elite MPS consumables.

• Reduce solvent and paint waste during cleaning and color changes
• Faster color swaps — install a new liner and lid in seconds
• Compatible with a wide range of coatings: primers, basecoats, clears, and more
• Less downtime and lower cleanup labor between jobs

How durable and precise is the MPS-840 adapter?

The adapter is machined to a precise thread spec to ensure smooth engagement with the gun’s gravity cup mount and to maintain an airtight, stable connection during spraying. Its robust construction is intended for repeated installation and removal while retaining thread integrity.

• Precision-machined threads for consistent fit and seal
• Durable material suitable for shop environments
• Designed for repeated liner changes without degrading performance
• Easy to install and remove with typical hand tools if needed

Who is this for: The Master Elite MPS-840 adapter is for professional painters and hobbyists who own compatible Iwata or similar spray guns and want to adopt the Master Elite disposable cup liner and lid workflow. It’s especially useful for shops doing frequent color changes, short production runs, or anyone aiming to cut cleanup time and solvent costs while keeping their current spray gun investment.