Rainier Arms RUC PRO MK1 5.56 NATO Partial Upper Receiver - 10.5"
AR-15 Partial Upper Receiver
In stock
Rainier Arms RUC PRO MK1 5.56 NATO Partial Upper Receiver - 10.5"
$550.00
Introducing the RUC PRO MK1 Partial Upper. Bringing the highest quality parts to the market, while offering the best value as well. This partial upper utilizes a Rainier Arms Low Pro nonadjustable gas block on our new and improved Rainier Arms Select barrel. Pairing up with new PRO series MK1 handguard to provide shooters with a rock solid handguard that can take any abuse. Throw in your favorite charging handle and bolt carrier group and you are good to go!
Upper Build:
- Rainier Arms Select 5.56 NATO Barrel - 10.5"
- Rainier Arms Forged Upper Receiver
- Rainier Industries PRO Series MK1 Handguard - 9.55"
- Rainier Arms Low Pro Gas Block - .750" (Non-adjustable) (Gasblock pinned)
- Rainier Industries .223/5.56 Flash Hider - 1/2x28
Weight: 2 lbs 13.9 oz
Please NOTE: BCG and Charging Handle NOT Included.
| SKU | RA-RUC-PRO-MK1-10.5-PU |
|---|---|
| Product Type | AR-15 Partial Upper Receiver |
| Manufacturer | Rainier Arms, LLC |
| Gas Block Diameter | .750" |
| Thread Pitch | 1/2x28 (.22 cal) |
| Twist Rate | 1:7 |
| Rail Length | 9.55" |
| Platform | AR-15 |
| Barrel Length | 10.5" |
| Caliber | 5.56 NATO |
| Threaded | Yes |
