Description: Rainier Arms Custom
Our UM Series is 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. Our custom 7.5" Pistol/CQB Uppers are built using the highest quality of components, test fired and ready to go. Look at the list of components and see for yourself. This upper is the best money can buy. All our custom uppers come complete with a limited lifetime warranty on all parts & workmanship. All NFA Rules Apply.
- Rainier Arms 7.5" UltraMatch Barrel
- 1:8 Twist
- Ratchet Rifling
- Bead Blasted Finish
- Rainier Arms UltraMatch Billet M4 Upper Receiver
- Centurion Arms C4 Rail 7"
- Pinned Low Profile Gas Block
- Match NIB Full Auto BCG
- Rainier Arms Raptor Ambidextrous Billet Charging Handle
- Noveske KX3 Flash Hider
ALL NFA Rules Apply