Midnight MP5 Madness 2

Back by popular demand. Now with the Slip Trip included.

Midnight MP5 Madness is back.

The Lee Sporting LS5 and Atrius Forced Reset Selector combination was one of our most popular Midnight Madness setups, and we’re bringing it back with one important addition.

This time, every package includes the compatible Slip Trip.

Why This Setup Works

The Lee Sporting LS5 housing and the Atrius Development selector system are both strong upgrades on their own, but pairing them wasn’t always straightforward.

Lee Sporting solved that with a dedicated Atrius Compatibility Plug designed specifically for the LS5 trigger housing.

The plug controls selector travel and prevents over-rotation, allowing the Atrius selector system to integrate cleanly into the LS5 platform.

Combined with the included Slip Trip, this package gives you the core components needed to build out the Midnight MP5 Madness configuration.

What’s Included

• Lee Sporting LS5 Incomplete Trigger Housing
• Atrius Compatibility Plug
• Atrius Forced Reset Selector
• Compatible Slip Trip
• Your choice of LS5 housing configuration:
  • Full Size Semi Shelf
  • Full Size Push Pin
  • K Semi Shelf
  • K Push Pin

This is not a complete trigger pack.

About the LS5 Housing

The Lee Sporting LS5 is a billet aluminum trigger housing designed for MP5-pattern firearms.

The LS5 improves ergonomics by moving the firing hand approximately 0.6" forward and 0.4" closer to the bore axis, creating a more natural interface and improved control.

Additional LS5 features include:

• AR-pattern trigger compatibility
• CNC-machined 4140 steel ejector lever
• Heat-treated and nitride-coated ejector
• Multiple shelf-height inserts on semi-shelf models
• 50D buffer on full-size versions to short-stroke the bolt carrier and help prevent hammer override
• Approximately 6.2 oz empty weight

About the Atrius Forced Reset Selector

The Atrius Forced Reset Selector provides three selector positions:

SAFE / SEMI / FULL-SEMI

Designed around compatible mil-spec AR-pattern fire control groups, the Atrius FRS replaces the traditional selector and provides a mechanically leveraged forced-reset system without requiring modification to the fire control group.

Atrius FRS Features

• Drop-in selector design
• Compatible with supported mil-spec fire control groups
• Heat-treated 4140 steel construction
• Corrosion-resistant finish
• 90-degree selector throw
• Positive selector positioning
• Textured and chamfered selector interface
• Made in the USA

Some fitting or tuning may be required depending on the host firearm and components used.

Why It Matters

Factory MP5 controls can feel dated compared to modern platforms.

The Midnight MP5 Madness setup gives you:

• Better hand positioning
• Improved selector ergonomics
• Better overall control feel
• AR-pattern fire control compatibility through the LS5 platform
• A stronger foundation for a more refined MP5 build

Compatibility

Choose the LS5 housing configuration that matches your host firearm.

Supported platforms include:

• PTR full-size and K models
• HK SP5
• HK SP5K
• HK SP89
• HK 94
• Century Arms AP5
• AP5P
• AP5SD
• Zenith ZF-5 family
• Dakota Tactical models
• MAC-5
• MAC-5K
• POF-5 variants

Minor fitting may be required, as MP5-pattern receivers can vary due to manufacturing and weld tolerances.

Important Note

This listing includes the LS5 incomplete trigger housing, Atrius Forced Reset Selector, Atrius Compatibility Plug, and compatible Slip Trip.

A Slip Trip is now included with this package.

This is not a complete trigger pack.

Pricing

Retail Value: $684+
Midnight Madness Price: $499

Now includes the Slip Trip!

Limited Availability

Midnight MP5 Madness is available again for a limited time.

Inventory is limited, and availability is not guaranteed once sold out.

Fitment Help

Not sure which LS5 housing version you need? Check this out - Compatibility Chart

Want to know what trigger to run? Check this out -Atrius Compatibility Page

Or reach out before ordering and we’ll help you determine the correct configuration for your host platform.

Legal Notice and Disclaimer

By purchasing this product, you are affirming that you understand all federal, state, and local laws that apply to you.

Laws surrounding firearms and firearm parts or accessories vary by jurisdiction, and it is your responsibility to know what is legal in your area.

Midnight Arsenal does not guarantee that this product is legal where you live and is not responsible for misuse, illegal activity, or violations of applicable law.

By completing your purchase, you agree that you are complying with all applicable regulations.

Restricted States: CA, CT, DE, FL, HI, IL, MA, MD, MN, NJ, NY, OR, RI, WA, D.C.

No U.S. territories or international orders.