This neatly fills the need if you have a forearm with a lower Picatinny rail. However, it only engages one slot, so I would not use it on heavy rifles. Also, unless you have a small wrench or steel fingers, the clamping nut is difficult to tighten sufficiently. Myself, I replaced the nut with a 5mm wing nut, split lock washer, and spacer. No more looseness.
Pros: Small, but does the jog well.
Cons: Should be limited to AR's; lighter rifles....
Would recommend: Yes
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