• Matched Cerro Forge Upper & Lower Receiver (7075-T6 Type III Hard Coat Anodized Per Mil-Spec Forgings
  • Low Shelf
  • SAFE - SEMI - AUTO Marked - End Plate Detent Buffer Tube Capture Mod! Drilled And Tapped for 6-32 grub screw INCLUDED -NO MORE FLYING SPRINGS!
• Mil-Spec Dimension, 6-Position, MULTI-VENT PWS Enhanced Buffer Tube - 7075-T6 Type III Hard Coat Anodized Per Mil-Spec
• Forward Controls Stainless Steel Enhanced Buffer Retainer
• Sprinco Blue Extra Power Buffer Spring (Cryogenically Treated)
• Weight Marked H2 Buffer
• 16" 41V50 CMV 1/7 Twist, 5.56/.223
  • .223 Wylde & .300 Blk available!
  • Multiple Profiles Available (Inquire)
  • M4 Feed Ramps in both chamber and upper receiver!
• HPT/MPI C158 Precision Ground H&M Nitride ROD Marked Bolt (Can process in Mag. Phosphate if wanted)
• Billet Extractor
• Spinco Enhanced Power 5-Coil Extractor Spring (INSERT or Vinton O-ring ONLY)
• Sprinco Enhanced Power Ejector Spring
• Sprinco Mil-Contract Bolt Gas Ring Set
• Chrome Coated Firing Pin
• Forward Controls NP3 index marked Cam Pin
• M16 - 8620 Bolt Carrier (Mag. Phosphate) Chrome Lined Gas Key & Carrier (Non-Slab) Standard Design
• Billet Gas Key: Rock-Op's Exclusive Stack-Six Staking!
• Mid-length Gas (Nitride Finish SS Gas Tube)
• Captured Take Down Detent & Spring (Hand Threaded Take-Down Detent Hole w/ 6-32 Grub Screw, Clipped SS Detent Spring to Fit)
• Stainless Nitride Coated .750" Low Profile Gas Block
  • Our Barrels Are Double Dimpled At Our Facility For Gas Block Security For Use In Combination With Our Knurled Set-Screws. The MOD-G Rifle gas blocks ARE NOT BULLET PROOF INSTALLS (Pinned) BUT THESE ARE STAKED AT THE GRUB/SET SCREWS. GRUB/SET SCREWS ARE KNARLED AND ROCKSET IN PLACE (REMOVABLE WITH A SMALL AMOUNT OF HEAT - BETTER THAN ANY LOCTITE FOR HOLDING THREADS UNDER HEAT!)
• MSP-Rock-Op 15.75" MLOK Rail
  • (3" MADE IN THE USA - ALUMINUM MLOK Rail Section and QD Point INCLUDED)
• Magpul PMAG w/Window
• Magpul K2+ Over-Molded Grip (Black)
• Magpul MOE CTR Buttstock (Black)
• Midwest Industries FU-BUIS Sights
• BCM Muzzle Device (Enhanced Bird Cage Design)
• CMC SS Anti-Walk Trigger/Hammer Pin Set
• Geissele Maritime Bolt Catch
• B.A.D. Magazine Release w/ Magpul Extended Button On Right Side)
• Rock-Op Exclusive Enhanced Trigger Guard (420 SS HD Coil Pin Standard)
• Geissele Mil-Spec Trigger (NON-MIM S-Marked)
• Armaspec 45* Ambi-Safety
• Standard Steel QD Endplate And Castle Nut STAKED!
• B.A.D. RACK Ambi-Charging Handle

Weight: 7.5 lbs.

Overall Length: 32.75"

Manufacture's Note: We lap every one of our upper receivers to ensure the best possible marriage of the barrel and upper receiver! All firearms are test-fired and extensively function checked before leaving our facility and are guaranteed to work right out of the box! Every bolt face and barrel are gauged together to ensure the safest and most reliable configuration going to our customers!