Our Combat Series is built with high quality components while keeping the costs down. Why buy a cheap quality upper when you can buy a custom high quality upper at an affordable price? The Rainier Combat Series Upper starts off with a Cold Hammer Forged, Chrome Moly Vanadium (CMV) chrome lined barrel with Direct Impingement gas operation. We also free float the barrel for better accuracy. Our barrels are matched to the bolt for best results. All our custom shop uppers are built using the highest quality of components, test fired and ready to go. When reliability matters most, professionals choose Rainier. All our custom uppers come complete with a limited life time warranty on all parts & workmanship.
- 16" Cold Hammer Forged CMV 1:7 5.56MM Chrome lined Barrel - Mid Gas
- Rainier Arms Forged Milspec M4 Upper Receiver - GEN2
- Pinned Low Profile Gas Block
- Centurion Arms C4 Free Float Rail System - 12"
- Mil Spec Full Auto Bolt Carrier Group
- 5.56MM MP Tested Bolt with Crane O Ring Installed
- Raptor™ Ambi Charging Handle
- Rainier Arms Xtreme Tactical Compensator
Your choice of Barrel Profile:
Light Weight or Standard Weight Barrels
14.5" or 16" - Muzzle Device pinning available at $39.95
Subject to availability
If you would like a LW or 14.5" barrel, please contact us after you place your order to discuss options.