Built with Extreme Accuracy as its primary focus. The backbone of every Rainier UltraMatch Upper starts off with a barrel made from a world renowned SHILEN blank and the ultra precise Rainier Billet Upper MOD 2. Look at the list of components and see for yourself. This upper is the best money can buy. Guaranteed to shoot SUB-MOA with match grade ammo and should group 1/2 MOA. All our custom uppers come complete with a limited lifetime warranty on all parts & workmanship.

Component List:

• Rainier Arms 16" UltraMatch Barrel
• Midlength Gas System
• 14" M-Lok Switch 5.56 rail
• 1:8 Twist
• Ratchet Rifling
• Bead Blasted Finish
• Rainier Arms UltraMatch Billet M4 Upper Receiver MOD 2
• Low Profile Pinned Gas Block
• Match NIB Full Auto BCG
• Rainier Arms Avalanche MOD2 AR-15 Charging Handle - Black
• Rainier Arms XTC 2.0 Compensator