Monk Customs - Rogue 9

Monk Customs ARP9 Lower Receiver – Built for Speed, Made to Dominate

Designed around the legendary ARP9 platform, this upgraded lower receiver from Monk Customs is a must-have for speedsoft and CQB players who demand performance. Already using an Oracle? You’re in luck – this lower is fully compatible, so you can swap it over effortlessly.

The real game-changer? Monk’s integrated adjustable mag release, perfectly positioned to match the standard ARP9 setup. Engineered for faster one-handed reloads, it’s fully adjustable to suit your playstyle – whether you prefer a lighter mag drop or a more controlled release. It also features interchangeable mag release springs for ultimate customization.

Whether you're clearing corners in tight CQB or pushing pace on the speed field, this lower is built to give you the edge.

Key Features:

• Integrated adjustable mag release for fast reloads
• Customizable mag tension & spring options
• Full aluminium body (upper & lower), anodised
• Handguard with fiber sight
• End Cap with On/Off Button
• 6" Aluminium Outer Barrel
• Trigger Housing + engine solenoid extension cables
• Body Pin (only 1 body pin required!)
• Engine and hopup alignment attachments - These work perfectly with Nexxspeed Hop units
• All required screws, O-rings, and Allen keys

(Polarstar MR Regulator needs to be fitted, you can use your existing one or purchase one with you Oracle for a discounted price.)

Compatible Internals: 

• Polarstar F2 HPA Engine
• Polarstar Trigger Board - we recommend these with Gorilla Mini FCUs
• Standard M4 triggers (Speed, Maxx, Nexxspeed, Retro Arms etc)
• Any AEG Inner Barrel ( Da Vinci 155mm work a Dream)
• Any Standard M4 Hop rubber (4uantum is our go to) 
• Hop Unit (Standard style, Maxx for P*, Nexxspeed, Retro Arms)