Sig Sauer MCX Spear LT Upper-Assembly Conversion Kit, 5.56mm, 16" Barrel, Black, Upper Receiver

This complete kit will convert any Mil-Spec AR-15/M4 lower into the top-preforming MCX-Spear LT.

Included Items:

• Complete 16" 5.56 NATO upper assembly includes Sig Sauer's removable 3-prong flash hider ready to accept Sig's SLH & SLX suppressor systems
• Receiver extension delete stock adapter so you may mount any folding or static stock or brace which uses a vertical 1913 Picatinny rail system
• Thread Pitch of 1/2x28

Compatible with the following lowers:

• MCX
• M400
• 516
• Any Mil-Spec AR-15/M4