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K5A-UMAR; UMAR Lower Receiver Assembly - A2 Buttstock

Quick Overview

Complete UMAR lower receiver assembly with A2 buttstock. Some options available.

Availability: Available (built to order)



Complete UMAR lower receiver assembly with A2 buttstock. Includes A2 buttstock with trap door, lower receiver, pistol grip and internal components.

This item is fully assembled and includes the following:

  • UMAR extended magazine length lower receiver
  • A2 pistol grip
  • A2 buttstock w/ trapdoor
    • Optional ACE brand skeleton stock
    • NO STOCK option
  • Lower receiver parts set (all internal fire control and magazine catchparts)
  • BOTH the UMAR and standard bolt catch assemblies
  • Supplied with your choice of UMAR WSSM magazine, or the UMAR .22-250 magazine.

Additional Information


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Olympic Arms, Inc. is not affiliated with the IOC/USOC or any other Olympic sports organization.