Genuine Harris Engineering Adapter #2R - Radius Flange Nut
Has radiused flange for mounting to wood or Ploymer fore-ends under magazines or gas tubes
Same demensions as the #2 except this one has a radius.
Flange Dimensions:
5/8" wide (16 mm)
1 3/8" long (36 mm)
Item Nr.: 309-HB2R
Made in the USA