just finished the lower build the other day..every thing goes together smooth an very similar to the AR 15..the detent springs are a breeze to do because they (rear take-down and safety selector detents are vertical) in the grip..it has a proprietary buffer tube and spring and H buffer is standard ..the upper is on its way..cant wait to make some noise and take it long range.The upper is a 416r 16inch stainless with 15inch key mod rail and nickel boron BCG...any one have any experience with this setup..not much on youtube..mostly good and some issues with extractor springs being very heavy until broke in..stay tuned it will be fun...update
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