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Dave's Review of Guntec USA AR-15 Aluminum Rail Height Gas Block
As another reviewer stated, there is an issue with back pressure when using this block. I attempted to solve the issue by using a combination of a lightweight buffer, reduced power recoil spring, and a Barking Spider muzzle device (krink device increases back pressure), the upper continued to fail to cycle, and sometimes even fail to eject.
Pros:
- Looks, rail height
Cons:
- Does not function properly, not reliable, minimal back pressure
Would Recommend:
No
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