These rails are NOT m-lok rails and you will need to remove your m-lok fore end to install the nut on the back. That said, they cinch down tight, with no wobble, and hold your accessories firmly in place. If you don't mind the old timey installation method, these are a nice, economical way to mount accessories to your rifle.
Verified purchase: Yes | Condition: New
The "m-lok" nuts that attach the rails to the rail are not M-lok. They are almost 1.5 X as wide as needed for m-lok rail holes. The nuts do not fit inside the holes and have to be inserted and moved into place to attach to the bolts. "JUNK"- only good note is that picatinny rails are acceptable but just barely, they also lack the m-lok alignment backing tabs .
Verified purchase: Yes | Condition: New
The metal pieces are too big . Have to grind them down or hold them inside the quad rail with hemostats to get them started unless you remove the whole rail . In the end , will hold your stuff on there .
Verified purchase: Yes | Condition: New
Solid construction, very light and well made. Looks awesome in my new AR.
Verified purchase: Yes | Condition: New
The mounting hardware is not threaded all the way through and it does not fit well. Very hard to mount and install like this I need to buy other Hardware to use this product
Verified purchase: Yes | Condition: New
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