Question, could the wood have swelled slightly due to humidity in your area causing the forend latch not to seat properly? This happened to my '21'. The forend would be secured properly when the gun was assembled; however, occasionaly when the gun was in the case with the forend fastened to the barrels, the BT forend would spring off of the barrels. The forend wood was releaved slightly where meeting the barrels and problem was solved - yes, I live in a high humidity area.