Tigger/sear needs cleaning/ repair. See a gunsmith if a thorough cleaning does not correct problem.
Request a manual from Beretta's web site
To disassemble a 20 gauge Beretta 390 shotgun, first ensure the firearm is unloaded. Remove the forend by pressing the forend release lever and sliding the forend forward. Next, open the action and remove the bolt by pulling the bolt release lever and sliding it out of the receiver. Finally, to separate the barrel from the receiver, locate the barrel latch, press it, and pull the barrel away from the receiver.
To disassemble a Beretta 390 shotgun, first ensure the firearm is unloaded. Begin by removing the forend; press the release button located on the underside of the receiver while sliding the forend forward. Next, open the action and remove the barrel by pushing the barrel release button and sliding the barrel forward from the receiver. Finally, you can access the internal components by removing the trigger assembly and bolt, if necessary, following the specific steps outlined in the owner's manual. Always refer to the manual for detailed guidance and safety precautions.
Currently (November 2009) they run about 750.00 New and about 675.00 Used.
Do I need to pull the oil pan to take off the timing cover on FE 390.
You will need to remove the trigger assembly. Once you remove this there is a hollow pin that goes through the hammer as well as the shell feed. REmove this carefully as there is a spring located on the left side that works for the shell feed. Once this is out, the trigger will pull straight out. The hammer braces fit on little pins on both sides of the hammer. pull out the old ones replace both with new ones and carefully put the pin back in. This is a 5 minute job, but this is also a good time to fully clean the trigger assembly. I usually spray it down with brake cleaner, blow it dry and then spray on CLP. This becomes a 15-20 minute job if you do a good job
390 squared is 390 times 390 = 152,100
46% of 390= 46% * 390= 0.46 * 390= 179.4
390 is divisible by 3: 390/3 = 130 390 is not divisible by 9: 390/9 = 43.3 recurring (that is, 43.3333..) 390 is divisible by 10: 390/10 = 39
20% more of 390= 390 + (0.2 x 390) = 468
70% of 390 = 273 = 70% * 390 = 70%/100% * 390 = 273
110 percent of 390 =429 110% of 390 = 110% * 390 = 110%/100% * 390 = 429/1 or 429