- Matched Cerro Forge Upper & Lower Receiver (7075-T6 Type III Hard Coat Anodized per Mil-Spec forgings)
- End-plate detent buffer tube capture mod, drilled & tapped for a 6-32 grub screw
- Mil-Spec dimension, 6-position, multi-vent PWS Enhanced buffer tube
- Forward Controls stainless steel enhanced buffer retainer, Sprinco Blue extra-power buffer spring (cryo treated)
- 16" 41V50 CMV 1/7 twist, 5.56/.223 barrel — .223 Wylde & .300 BLK available, multiple profiles available
- M4 feed ramps in both chamber and upper receiver
- HPT/MPI C158 precision-ground H&M nitride ROD-marked bolt, billet extractor, Forward Controls NP3 index-marked cam pin
- M16 8620 bolt carrier (Mag. Phosphate), chrome-lined gas key & carrier, Rock-Op exclusive Stack-Six staked billet gas key
- Mid-length gas system, captured takedown detent & spring, stainless nitride-coated .750" low-profile gas block
- MSP-Rock-Op 15.75" M-LOK rail (3" USA-made aluminum M-LOK section + QD point included)
- Magpul PMAG w/ window, Magpul K2+ over-molded grip (black), Magpul MOE CTR buttstock (black)
- Midwest Industries FU-BUIS sights, BCM enhanced birdcage muzzle device
- CMC stainless anti-walk trigger/hammer pin set, Geissele Maritime bolt catch
- B.A.D. magazine release w/ Magpul extended button, Rock-Op exclusive enhanced trigger guard
- Geissele Mil-Spec trigger (non-MIM, S-marked), Armaspec 45° ambi-safety
- B.A.D. RACK ambi charging handle
We lap every upper receiver for the best possible barrel/receiver marriage. Every rifle is test-fired and function-checked before leaving the shop, guaranteed to work right out of the box.



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