Brownells has the much vaunted Geissele Mk-16 complete upper receiver groups in stock.

Too see pricing, you’ll have to add them to your cart.

These URGI-I Complete Uppers are:

*Available in 10.3 inch or 11.5 barrel lengths

*Come Pin and Welded with SureFire SF4P flash hiders

*Feature Pinned Gas Blocks and enhanced bolt carrier groups for further reliability.

Check out some other featured deals on here!