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Seekins Precision SP 300BLK NX8 Complete 8" Upper
Seekins Precision SP 300BLK NX8 Complete 8' Upper

Seekins Precision SP 300BLK NX8 Complete 8" Upper

Part Number:NX8-300BLK
On sale: $859.95
Retail Price:$899.00
You Save:$39.05(4%)
Out of Stock.

Choose Options

Add QD Sling Swivel [+$8.95]
Add One 5 Slot Seekins MLOK Rail [+$24.00]
Add Two 5 Slot Seekins MLOK Rail [+$47.00]
Add Three 5 Slot Seekins MLOK Rail [+$69.95]
Seekins Precision 300BLK NX8 Complete 8" Upper


The skeletonized upper receiver is CNC machined from a solid billet of 7075-T6 aluminum to Seekins Precision exceptional standards, far exceeding mil-spec requirements. The receiver and included NOXs™ Hand Guard top rails are seamless, providing monolithic receiver performance and maximum optics and accessory mounting options. Both the receiver and hand guard are Type III Class 2 Hardcoat Anodized matte black.

Extremely lightweight and infinitely adaptable because of the M-LOK attachment system, the included NOXs™ hand guard is perfect for tactical and competition use. Precision machined from 6061-T6 aluminum, it features a top Picatinny rail and M-LOK slots at 3, 6 and 9 O’clock positions for solid mounting of accessories where needed.

The NX8 complete upper come standard with a match grade barrel in .300BLK. Unlike conventional upper receivers, the NOXs™ Billet gas system can be finely tuned for performance and reliability because of the included Seekins Precision Adjustable Gas Block. The gas block and Gas Tube are Melonite coated for reliability and ease of maintenance. Seekins highly effective Melonite coated NEST Flash Hider is also included.

NX15 uppers are compatible with Mil-Spec lower receivers and most aftermarket rail systems.

        CNC Machined from solid 7075-T6 Billet aluminum
        Aggressive, unique design lines only offered on Seekins Precision Billet uppers
        M4 Feed Ramps
        Mil-Spec Full length 1913 picatinny top rail that allows seamless mounting with handguard
        Type III Class 2 Hardcoat Anodized Finish
        Melonited Adjustable Gas Block, Gas tube and M16 Bolt Carrier Group
        NEST Flash Hider
        5 Machined in Anti-Rotation QD sling mounts
        Scalloped rails to remove all sharp edges for comfort

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