M4 Style Standard Big Bore Upper Receiver – Right Handed

$149.00

Receiver Modification – You must buy a barrel to select this option

Description

NEVER HOLD THE RECEIVER BY THE TAKEDOWN PIN LUGS WHEN TORQUING THE BARREL NUT!

Use a clam shell fixture to hold the receiver during barrel installation.  Use of a Reaction Rod can damage the barrel extension index pin as well as the receiver itself.

Ejection port enlarged, includes forward assist and ejection port cover.  Made from 6061 aluminum.

*Tech Tip: To enhance feeding reliability with blunt nose bullets, it is recommended to blend the barrel feed ramp into the upper receiver after barrel installation, as shown. (Warning: DO NOT Modify the steel locking lugs on barrel extension.)

Weight:  8.5oz