it is, I have TWS covers on several rifles and i've never had any trouble in the 10+ years I've been using them. just make sure you adjust them correctly
No you don’t I have one for m70. He does need to take a flathead to the part where the cover hinges on tho, to make it fit tighter. And bend in the cutout on the side of the dustcover to ensure that as well.
M70 for sure 👍 at the start of the video you can see the button for the dust cover on the side of the receiver, plus it’s got the bulged trunion. I’d say m70 all day