Rainier Arms MK12 223 Wylde Partial Upper Receiver - 18"
AR-15 Partial Upper Receiver
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Rainier Arms MK12 223 Wylde Partial Upper Receiver - 18"
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$1,050.00
Introducing a cloned upper receiver build of the MK12 SPR. Bringing the highest quality parts to the market, while offering the best value as well. This partial upper build utilizes a Precision Reflex GEN III free float handguard and front sight. Pairing up with our forged upper receiver and Ultramatch MOD 2 SPR 18" barrel. Throw in your favorite charging handle and bolt carrier group and you are good to go!
Upper Build:
- Rainier Arms Forged A4 Upper Receiver
- Rainier Arms Ultramatch MOD 2 MK12 SPR .223 Wylde Barrel - 18"
- Precision Reflex Inc Carbon Fiber Free Float Handguard - 12.5"
- Precision Reflex Inc G1 Flip Up Front Sight w/ .750 Crossbolt
| SKU | RA-MK12-DI-18R-PU |
|---|---|
| Product Type | AR-15 Partial Upper Receiver |
| Manufacturer | Rainier Arms, LLC |
| Gas Block Diameter | .750" |
| Color | Black |
| Rail Length | 12.5" |
| Barrel Profile | SPR |
| Barrel Length | 18" |
| Caliber | .223 Wylde |
