I like the REV rail, others that are straight Keymod all look the same. I actually dont even use the keymod part, tried the keymod covers but didn't make a difference really.
According to Rainier's website the Short "Shift" grip is;
- One Piece Billet Design
- Slotted Screws Attachment
- Aircraft Grade 6061-T6 Aluminum
- Military Specification Type III Hard Coat Anodized
- Light weight 2.1 oz
The MAGPUL AFG is 2.92 oz, AFG2 is 2.53 oz, and the XTM Hand stop kit has no listing for weight, but considering it is 3 1/2 XTM panels with some extra material probably lighter than the Shift.