Chambered in .223 Wylde with a 1:8 twist

Standard M4 feed ramps

Pre-installed forward assist and ejection port cover

Compatible with MIL-SPEC lower receivers

7075-T6 Billet aluminum upper receiver

6061-T6 aluminum handguard

M4 Feed Ramps

Monolithic picatinny top rail

Type III Class 2 hardcoat anodized finish

Melonited adjustable gas block, gas tube and M16 bolt carrier group

Rook Flash Hider

5 machined in anti-rotation QD sling mounts

Scalloped rails

Proof that the American Dream is alive and well, Seekins Precision began in 2004 with a single product. Their rapid growth has carried them from the early days of manufacturing scope rings to include more than ten major product lines, including complete rifles.The NX16 Complete Upper Receiver is CNC machined from a solid billet of 7075-T6 aluminum, to exceed MIL-SPEC requirements. Chambered in .223 Wylde, this upper can be finely tuned using the included Seekins Precision Adjustable Gas Block. Lightweight and versatile, the NOXs handguard is well suited 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. The receiver and handguard are protected by a Type III Class 2 hardcoat anodized matte black finish.