UTG® M-LOK® Ultra Slim Handstop, Red f2 this is probably your best

this is probably your best option

Can be used easily with your standard sites due to the tracer unit's small size

Adjustable (Rotary Style)

1x 14250 Battery

Power: Spring

UTG® M-LOK® Ultra Slim Handstop, Red f2 this is probably your bestCompact and Slim Size Does Not Interfere with Other Accessories and Parts Mounts Bidirectionally, Tailoring to the User's Preference in Handstop Orientation Lightening Cuts Reduce Overall Weight Ergonomically Contoured and Serrated Front and Rear Handstop Faces for a Secure Support Hand Placement Precision Machined from Aircraft Aluminum and Finished in a Matte Blue Anodize Includes M LOK Hardware and Installation Tool