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Primary Weapons Systems EBT Mod 2 End Plate and Castle Nut
$49.95 $40.99 Save 18%
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omgnqqb's Review of Primary Weapons Systems EBT Mod 2 End Plate and Castle Nut

I ordered 2 kits to work with the SBA3 braces for my pistol builds. The design is definitely unique compared to most other castle nuts. The idea behind the "ratcheting system nut" is so that you do not have to stake your castle nut, just tighten until you cannot anymore and adds extra security as well as peace of mind for it not coming loose. I've read some people using vice grips to tighten down this castle nut because of the grooves, but I still used the old fashion AR Castle nut tool/wrench. The end plate is simple, thinner than some of the other end plates I've had in the past but still very durable. The only con is price. You can find cheaper basic castle nut and end plate kits. If you are really into building, you appreciate the little things. I like lightweight, durable, and great craftsmanship so I wouldn't hesitate buying this again. Shot both pistol builds last weekend, held up just fine. Very happy.
Pros:
  • Great craftsmanship & easy install
  • lightweight & durable
Cons:
  • a little pricey compared to others
Best Used for:
  • AR 15 platform
Would Recommend: Yes
Was it helpful to you? Yes | No
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Last updated 2025-11-12 UTC.