300 BLACKOUT 16" HBAR QUAD RAIL AR15 FLAT TOP UPPER RECEIVER ASSEMBLY

-AVAILABLE WITH OPTIONAL BLACK NITRIDE BOLT GROUP ASSEMBLY

Now you can get the classic 300 BLACKOUT HBAR heavy barrel look and feel for your AR15 without having to assemble all the small parts!  Our assembly team builds the upper receiver with a 300 blackout heavy barrel and quad rail rifle handguards so its ready to drop on to your lower receiver. 

The complete 300 BLACKOUT 16" HBAR QUAD RAIL AR15 FLAT TOP UPPER RECEIVER ASSEMBLY comes standard with the following parts:

• 04153 - AR15 16" 300 AAC BLACKOUT BARREL 4140 1x7 TWIST WITH BARREL EXTENSION AND GAS HOLE - BLACK OXIDE FINISH
• 00158 - AR15 M4 FLAT TOP UPPER RECEIVER WITH FORWARD ASSIST AND EJECTION PORT DUST COVER FOR AR15 RIFLE
• 03301 - CHARGING HANDLE ASSEMBLY
• 02038 - LOW PROFILE SHORT STEEL .750 GAS BLOCK FOR AR15
• 01657 - CAR LENGTH GAS TUBE FOR AR15 / M16
• 01660 - GAS TUBE ROLL PIN FOR AR15 / M16
• 04524 - UTG MODEL 4 AR15 PRO CAR LENGTH 7" FREE FLOAT SLIM LINE QUAD RAIL
• 04489 - AR15 / AR10 FLASH HIDER .30 CALIBER A2 "PARTIAL CAGE" FOR 308 WIN / 300 BLACKOUT / 300 WHISPER / 300 ARROW
• 04490 - 5/8" CRUSH WASHER FOR .30 CALIBER THREADED BARRELS - AR15 / AR10

Complete upper is also available with the optional BLACK NITRIDE Bolt Carrier Group (04945) installed.  Please select preference when ordering.