I finally got the opportunity to take my new Upper build to the range today.
The build consists of:
- Aero Precision M4E1 Threaded Assembled Upper Receiver with the face lapped for squareness.
- Toolcraft Bolt Carrier with a properly headspaced San Tan Tactical 6mm ARC Bolt
- BCM #4 Charge Handle
- ALG 10” EMR V1 Handguard
- 12” 6mm ARC Monster Barrel, Odin Works Tunable Gas Block, Aero Nitride Gas Tube and a Silencerco ASR Muzzle Brake calibrated with a sold spacer.
- Vortex 1-6x Strike Eagle mounted in a Warne 30mm XSKEL mount. I’ve used this scope/mount combo many times for initial testing. The scope was bore-sighted before going to the range.
- All parts were brand new except the ALG Handguard.
The completed Upper assembly was installed on a SBR lower which runs a standard spring and H2 Buffer. All the uppers used with this Lower Receiver have Adjustable Gas Blocks.
The Problem:
- I decided on a 50-yard suppressed zero with this barrel. A Silencerco Saker 7.62 suppressor was installed on the Silencerco 7.62 ASR Brake.
- I was still shooting approximately 4” high when I ran out of adjustment on the scope. This has never happened before with this scope or any of my other builds.
- I was using factory Hornady 108 gr ELD ammunition that was just chrono'd at 2323 FPS.
Thanks in advance.