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How does the QD mount hold up to a hardened steel stud? One would think the aluminum will fatigue or round out over time. Is the QD opening steel? — 1 Answer

by Devon, from VT, United States Asked on November 21, 2018

Name Fortis Manufacturing AR-15 LE Tapered Castle Nut/End Plate K1 System (4.7)
As Low As $37.95 Save Up to 26%
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Answered by Armando R., Gear Expert, from IL, United States, on September 10, 2019

It should realistically not have any fatigue or rounding issues. The aluminum used in this castle nut/end plate combo is 7075-T6 which is the same material that mil-spec AR-15 upper and lower receivers are made of. I say this because AR lowers/uppers get steel mounted mounted and installed in them with no issue as long as the part is up to snuff in regards to quality control, which Fortis definitely is.

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