I ordered a TM P90 RD from wolf armouries sept-october 2008. The product performed as expected until 4/1/09 it stopped working mid way through target practice with no warning having just fired around 380 rounds, there was no wind down that you would associate with a dead battery, and no clunck or click of something internal breaking, the gun doesn't rattle when shaken either, if you could suggest whether it is the battery, fuse or internal i would appreciate. thank you