samchar12 said:
I am having a different issue with my 715T flat top. Picked it up about 3 weeks ago and have put about 500 rounds through it with only a couple of FTF issues using a variety of ammo on two sessions (150 first time and +/-250 second time)
My problem is that after our second outing I pulled it apart to clean it (first time) and that went smoothly, with the exception of a missing rear take down pin. I am having trouble pulling the bolt back now. It will work fine when out of the plastic, but seems to lock-up after I put the adjustable stock back on. If I turn it upside down sometimes the problem goes away, but will come back once the gun is righted. I can't shoot it until this condition is resolved.
Any suggestions or things I should look for? I have sent a question to Mossberg service as well.
It might be the bolt buffer, I had similar problems after my first cleaning. Review the You Tube vids on re-assembly for placement and orientation---the parts breakout for the 702 in the back of the manual also shows the buffer in the correct position (the 715T breakout doesn't have parts detail.)
The rear black pin holds the bolt buffer in place, and the buffer can be knocked out of position pretty easily when dropping the trigger assy into the receiver housing, particularly when you jiggle the bolt.
I cleaned the recoil spring, bolt, trigger assy, clip latch, etc. of my rifle (two-week-old 715T flat top) really well with Hoppe's # 9 followed by a light oiling before using it and haven't had any FTFs, jams, extraction failures, etc. after shooting about 300 rds. Ammo is Federal 36 gr HP selects (i.e. standard 22LR ammo.)
My rifle is the top-of-line version with a threaded barrel and flash suppressor, and the feed ramp on the trigger assy looks different to me from a standard (top-carry-handle) 715T that I compared it with. It may be my imagination, or possibly it's a fix for some of the feed problems mentioned in this and other streams. The ramp does nick bullets a little while feeding, which I don't like, but the issue seems to be getting better as the rifle is broken in.
Overall, I strongly recommend watching the (multiple) You Tube dissassembly and assembly videos before and while working on your rifle, the manual sucks IMHO. In addition, the stocks on flat-top (no carry handle) 715T's are different than those shown in the manual, they're one piece per side (the forestock isn't separate) and the rear take down (allen) screw is inside the housing, not in the handle.
So far I'm very pleased with the rifle, it's a blast to shoot---didn't enjoy the takedown, cleaning, and multiple attempts/OJT required to reassemble it, though.