brightness of the display 202 also illustrated in fig2 is first bracket 116 as illustrated the first bracket 116 includes a first bracket portion 208 and a second bracket portion 210 in this embodiment the first bracket portion 208 fits over a barrel of a firearm and the second bracket portion 210 fits under the barrel of a firearm the first bracket portion 208 and the second bracket portion 210 are coupled together by bolts 216 and 218 in particular bolt 216 secures the first bracket portion 208 to the second bracket portion 210 with nut 217 and bolt 218 secures the first bracket portion 208 to the second bracket portion 210 with nut 219 in addition bolt 216 passes through a connection flange 207 to secure the range finder 200 to the first bracket 116 as illustrated in fig2 the display housing 102 extends from a first side 203 of the circuit housing 310 and the flange 207 extends from a second side 205 that is opposite the first side 203 moreover although not shown the second bracket is constructed in the same manner to couple the range finder 200 to the barrel 112 of the firearm 101 at another location further illustrated in fig2 is a first protective material 212 positioned adjacent a first inner surface 209 of the first bracket portion 208 and a second protective material 214 positioned adjacent a second inner surface 211 of the second bracket portion 210 the first and second protective material 212 and 214 are used to protect the barrel 112 of the firearm 101 moreover in one embodiment the first and second protective material 212 and 214 come in different thickness to accommodate different barrel diameters the first and.