16" M4 STYLE AR15 FLAT TOP UPPER RECEIVER ASSEMBLY - 5.56 / .223

-AVAILABLE WITH OPTIONAL BLACK NITRIDE BOLT GROUP ASSEMBLY

Now you can get the M4 look and feel for your AR15 without having to assemble all the small parts!  Our assembly team builds the upper receiver with an M4 profile barrel and M4 Handguards so its ready to drop on to your lower receiver. 

The complete AR15 M4 Style 16" Upper receiver assembly comes standard with the following parts:

• 00326 - AR15 / M16 5.56 / .223 16" M4 PROFILE1:9 TWIST BARREL
• 00158 - AR15 M4 FLAT TOP UPPER RECEIVER WITH FORWARD ASSIST AND EJECTION PORT DUST COVER FOR AR15 RIFLE
• 03301 - CHARGING HANDLE ASSEMBLY
• 02188 - AR15/M16 PICATINNY RAIL GAS BLOCK FOR .750 BARREL
• 01657 - CAR LENGTH GAS TUBE FOR AR15 / M16
• 01660 - GAS TUBE ROLL PIN FOR AR15 / M16
• 03300 - BARREL NUT - AR15 / M16
• 01662 - DELTA RING ASSEMBLY FOR AR15 / M16 BARRELS
• 03471 - AR15 M-4 HANDGUARDS - DOUBLE HEAT SHIELD
• 03468 - HANDGUARD CAP, ROUND FOR AR15 HBAR - .750 BARREL DIAMETER
• 00283 - AR15 A2 "PARTIAL CAGE" FLASH HIDER
• 01661 - CRUSH WASHER FOR .223 / 5.56 / .22LR THREADED BARRELS - AR15 / M16

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