Relatively easy custom I made the leather armor out of sculpty the goggle glass is Hot glue and then repainted.

So here is his story in case you haven't kept up:

Ultimate Henry Pym
In the Ultimate Marvel continuity, Henry "Hank" Pym is a brilliant, but mentally fragile scientist who takes Prozac and is married to Janet Pym, née van Dyne. He is chosen to work on the "Super Soldier Project" for S.H.I.E.L.D. under Nick Fury. Hank is also the superhero "Giant-Man", able to grow to 59 feet and 11 inches (60 feet being the point where the human body cannot support its own mass). He gains his powers after experimenting on the blood of his wife Jan, who is a mutant.

He has been attempting to change, going on a medication, and Jan believes that joining the Ultimates could be a new start for them. But the tensions of losing and humiliating himself in a battle with the Hulk, and his jealousy of Jan's "friendship" with Captain America, lead to a heated argument between the couple that ends after they have a violent fight, and Janet is hospitalized. Captain America himself takes revenge, beats him to a pulp despite the fact that Pym was giant-sized at the time, and forces him out of the team.

He is eventually allowed back into the Triskelion, but not as a member of the Ultimates; instead, he serves with the staff and acts as a psychiatrist for inmates, including Norman Osborn, Otto Octavius, Maxwell Dillon, Flint Marko and Sergei Kravinoff.

Henry seems to overcome his violent streak and becomes desperate to get in the Ultimates again, becoming the ant-manipulator "Ant-Man" and building two prototype androids, Ultron and Vision II. Despite this, he remains a pariah, becoming increasingly depressed as S.H.I.E.L.D. debuted an entire team of Giant-Men who are capable of breaking the 60-foot "limit" that he had been unable to overcome and making Hank's place obsolete. Desperate, he joins the vigilante team Defenders, starting a meaningless affair with Valkyrie and making a laughing stock of himself.

In spite of his sad descent, he is able to relate to his estranged wife Jan again, and the two begin to see each other again (though their renewed relationship has been platonic so far). On a side note, he is visited by the traitor within the Ultimates the Black widow but seems too much in a funk to seriously care. It has been revealed that Pym is building an army of Ultrons for the invading Coalition. Hank Pym keeps the American populace in line using the Ultron robots he created, not knowing how full scale the attack will prove to be.

As the tide of the battle starts to turn to the Ultimates favor, Hank orders the Ultron robots to help The Ultimates and they start taking out The Liberators armed guards. He swears to Quicksilver that he planned on infiltrating The Liberators from the start. Although he appears to be lying, at some point earlier he did give the Wasp a growth serum. Interestingly, when she uses it, she grows taller than Giant-Man ever did, to nearly the same size as the S.H.I.E.L.D. Giant-Men. Apparently Pym finally overcame the 60-foot limit that plagued him.

It has been suggested that this version of Hank suffers from bipolar disorder, which would explain his mood swings between manic/creative highs and depressive/violent lows. His use of Prozac seems to bear this out, as this drug is often prescribed to sufferers. Given that bipolar is largely a genetic condition, it's not entirely Hank's fault that he's the way he is.