Officially introduce yourself to the community by sharing your goals, obstacles or accomplishments. Don't be shy.. we're all here for the same reason. The more support we share the easier it will be to reach our goals!
Moe
To gain mass on your arms has to take time, but with heavy weight lifting, you'll get their faster. Heavier weights grow muscle mass, light weights with many reps creates tone.
Just stick to heavy weight lifting, about 3 sets with 6-8 reps or more, don't kill yourself though, Good form is what counts to create a strong and healthy body, it just takes time, patience is the key.
Peace out CUBAN GATOR.