No. It will need to be used on an ar10 lower. Compatibility is not as universal as the ar15's.
This Aero Precision M5 18in 6.5 Creedmoor SS Complete Upper Receiver does not feature an adjustable gas block. It uses a low-profile gas block with a mid-length gas tube.
We build our 308 M5 platform to the AR308 pattern, with a DPMS High Profile (.210) Tang rail and 1-7/16 x 16 TPI. Please note that our .308 products are machined to AR .308 specs, which is similar but not the same as DPMS Gen 1. Unfortunately, because there is no set standard, we are unable to guarantee compatibility with any other manufacturer’s products within this platform.
• VG6 Precision Epsilon 556 High Performance Muzzle Brake
The are DPMS Gen 2 High Profile.
This upper will need to be used with an .308 lower.
The overall length is not published by the manufacture.