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Product Description
Magwell for AR15, "screw blocks" either side of the magwell also serves as a resting spot for your index finger when you're firing the rifle. M4 grub screws optional (M4 tap to be secure, M3 will go straight in as is), I recommend M3 / M4 (tapping required) x 10mm, however mine is a very snug fit and works without it, receiver dependant of course.
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