One Horse Complete Upper Receiver .300 BLK 10.5″ with BCG and Charging Handle
$277.27
Dominate close-quarters engagements with the One Horse Complete Upper Receiver in .300 Blackout. This compact 10.5″ upper, featuring a 1:7 twist rate, is perfect for tactical hunting and suppressed AR15 pistol builds, ensuring optimal stabilization for both subsonic and supersonic rounds. The lightweight 10″ M-Lok handguard offers versatility for accessory mounting, while the nitride-finished bolt carrier group guarantees smooth operation and enhanced durability.
6 in stock
Conquer close-quarters with this compact 10.5" .300 Blackout Complete Upper Receiver. Featuring a 10.5" barrel with a 1:7 twist rate this upper ensures optimal stabilization for both subsonic and supersonic rounds making it ideal for tactical hunting or suppressed AR15 pistol builds. The 10" M-Lok handguard provides a lightweight modular platform for mounting accessories while the nitride-finished bolt carrier group delivers smooth cycling enhanced durability and low maintenance. Complete with a charging handle and built to Mil-Spec standards this upper is ready to pair with any AR15 Mil-Spec lower receiver for a seamless high-performance setup.
- Caliber: .300 BLK
- Barrel Profile: Medium
- Muzzle Thread: 5/8X24
- Twist Rate: 1/7
- Gas System: Pistol
- Material: 4150
- Handguard Length: 10 in.
- Country of Origin: U.S.A
| Weight | 3.760 lbs |
|---|---|
| Dimensions | 25.500 × 3.250 × 3.000 in |
| Manufacturer | One Horse |
PROCESSING & SHIPPING
Orders typically ship within 1–3 business days (Monday–Friday) after payment and all required documentation are received. Time to arrival after shipment depends on the carrier. Shipping method is at BT Gun Company’s discretion; ammunition and oversized accessories are charged at actual shipping cost. We do not ship to Hawaii or Alaska.
FIREARM TRANSFERS
- Firearms must ship to a licensed FFL dealer of your choosing — confirm with them first that they can accept the transfer.
- Your receiving FFL will need to email their license to [email protected] before we can ship.
- Inspect your firearm at your FFL’s location before signing ATF Form 4473 — once signed, the firearm is considered accepted.
You’re responsible for knowing the firearms laws in your state before ordering. For complete shipping, returns, and restocking-fee policy details, see our Shipping & Returns page.
Reviews
Clear filtersThere are no reviews yet.