  We present Quantum Monte Carlo calculations of magnetic moments, form
factors, and densities of $A\le 10$ nuclei within a chiral effective field
theory approach. We use the Norfolk two- and three-body chiral potentials and
their consistent electromagnetic one- and two-nucleon current operators. We
find that two-body contributions to the magnetic moment can be large (up to
$\sim33\%$ in $A=9$ systems). We study the model dependence of these
observables and place particular emphasis on investigating their sensitivity to
using different cutoffs to regulate the many-nucleon operators. Calculations of
elastic magnetic form factors for $A\leq 10$ nuclei show excellent agreement
with the data out to momentum transfers $q\approx 3$ fm$^{-1}$.
