Rooftop Defense Complete RDM4 Lower Receiver Assembly


SweatshopSpeed™ — Order by 3PM Central for Same Day Shipping
No Backorders, All In-Stock Items are Ready to Ship

Out of stock

You must register to use the waitlist feature. Please login or create an account

Rooftop Defense Complete RDM4 Lower Receiver Assembly

Our complete RDM4 lower receiver assembly is meticulously assembled and built for a lifetime of hard use.

The complete RDM4 lower is painstakingly built with great attention to detail — built to perform when dependability is an absolute must. Built to our specifications by shooters, for shooters.

Marked ‘RDM4’, ‘5.56mm’ and ‘ROOFTOP CARBINE’.


  • Color: Matte Black
  • Finish: Hardcoat Anodizing
  • Trigger: Geissele SSA-E
  • Spring: Sprinco Green
  • Buffer Assembly: VLTOR A5H2
  • Stock: B5 Systems Enhanced SOPMOD Stock w/ QD Endplate
  • Grip: Magpul MOE

This is a regulated item and requires shipment to a Federal Firearms License holder. After you have placed your order, please have your order number and a copy of your preferred store’s FFL emailed to to avoid delays. After I have received their FFL, I will ship your order as soon as possible!


There are no reviews yet.

Be the first to review “Rooftop Defense Complete RDM4 Lower Receiver Assembly”

Your email address will not be published. Required fields are marked *