Blackwood Arms Side Charging AR-15 Upper Receiver
Stripped Upper Receiver and Forward Assist
Buy the CMMG Upper Receiver Group and more Shooting items at Bass Pro Shops.
TopStop AR Upper Receiver Cover. Keep Your BCG & Charging Handle in place while sealing out any debris from your AR's upper receiver when broken down transportation is necessary.
How to build an AR-15: Beginner's guide - thearmsguide.com
Wing Tactical - Strike Industries AR-15 Charging Handle with Extended Latch, $31.95 (http://www.wingtactical.com/firearm-parts/ar-15/upper-receiver-parts/charging-handles/strike-industries-ar-15-charging-handle-with-extended-latch/)
AR15 Upper Receiver Weight Comparisons [2009-11-15] - 03DESIGNGROUP