JB Conversions 2307 LoMax 300 - Manual (Page 12)

23) Position the 2 nd rail and detent ball as done on the 1 st rail. Depress the
detent ball with a punch and push the rail through the housing just past the
ball. Be sure the 2 nd rail is installed as shown (Fig.22) with the detent
pockets positioned as you see here. Do not rotate the rail while performing
this step.
Fig.22
24) Push or tap the 2 nd rail inward until 5-5/16” of the rail remains exposed. Do
not rotate the rail at this point (Fig.23).
Fig.23
25) Roll the second rail counter-clockwise 90 degrees. You should feel the
detent ball “pop” into place securing the rail (Fig.24).
Fig.24