Have a custom AR10 for sale. Rifle is already zeroed at 100 yds with Winchester M80 ball. Suppressor ready with a plan b threaded muzzle device parts list below. 
Rifle shoots pretty soft. Has about 350 rounds through it.  Have over 2500 into the build. My loss your gain. 

upper: 

- Aero M5 upper receiver

- 16in criterion M118 barrel

- BCM .750 gas block and tube

- FCD 3P10 muzzle device 

- KAK dual ejector BCG 

- CMT 15in UPHR AR10 mlok handguard

- Annex defense ARCA rail mount 

- Harris picatinny bipod 

- Radian Raptor SR25 charging handle 

- Larue LT111 OBR 34mm QD scope mount 

- Arken EP-5 (early production) new ones aren't as good 

Lower

- Aero M5 lower 

- Aero M5 LPK

- A2 grip 

- Larue MBT 2 stage trigger

- A5 tube with sprinco orange spring and H4 buffer 

- B5 Bravo stock 

- Ambi magazine release 

- Ambi safety selector