Having now purchased both these toys, has anyone else had the same trouble getting the EMP generator (Lockdown's engine accessory) to connect to Ratchet's left arm?

The spot where is is supposed to attach is clear, but it won't actually click into place. Worse, the small button on the underside that flips out the barrels has a spring that works to actually push the accessory off of the arm!

Am I doing something wrong, or is this another Hasbro QC cockup?