The National Rifle Association has endorsed Kansas Gov. Jeff Colyer in his Republican primary race against a field that includes Secretary of State Kris Kobach. But Kobach touted his own endorsement Monday by Gun Owners of America, which describes itself as a “no-compromise” gun-rights organization. Colyer released a copy of a letter Monday from the NRA’s political action committee backing Colyer and giving him an “A” rating.     C…