+1-800-504-5897 Help Center Check Order Status
About Us Policies Reviews How To
Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

Back pressure issues - Guntec USA AR-15 Aluminum Rail Height Gas Block

by Dave, Verified Owner from CO, United States Written on December 7, 2021
Review for Guntec USA AR-15 Aluminum Rail Height Gas Block
Guntec USA AR-15 Aluminum Rail Height Gas Block
Guntec USA AR-15 Aluminum Rail Height Gas Block
Currently Unavailable View Product
Write a Review View All Reviews
Compare (0)
1 item has been added
Add at least two items to compare

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
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No
Share