Aero Precision M4E1 Threaded Barreled Upper Receiver .300 BLK Pistol Length - ATLAS S-ONE - 8" Aero percision 300blk The Holosun 510C-GR is a

The Holosun 510C-GR is a beast for tactical drills

After sitting motionless for a brief period of time

Altogether

The revolutionary patent-pending ACSS Vulcan reticle provides a large circle guiding the eyes towards the 10 MOA center chevron

- Unlimited eye relief to acquire aiming point and target

Aero Precision M4E1 Threaded Barreled Upper Receiver .300 BLK Pistol Length - ATLAS S-ONE - 8" Aero percision 300blk The Holosun 510C-GR is aAero Precision M4E1 Threaded Barreled Upper Receiver . 300 BLK Pistol Length ATLAS S ONE 8" SKU: APAR700301M1 MPN: APAR700301M1 DETAILS Note: This barreled upper receiver assembly has a barrel length under 16 and is subject to all NFA rules and regulations. Know your local laws before purchasing. The Aero Precision Upper does not include a BCG or charging handle This Aero Precision M4E1 Threaded upper receiver group comes completely assembled with an