Putting a PPS M870 Back Together Again

[Bar1975]

i've taken the PPS M870 apart to replace the bolt with an upgrade bolt..

having a little trouble putting everything back together

Has anybody put one of these together? Does the entire Bolt, Magazine Tube, pump handle and Barrel go into the receiver at the same time?

i can't seem to put it back together like the real 870 where the bolt simply rests on the action bars and slides into the receiver wihtout the barrel being installed.

been trying but seems to me that the entire barrel/bolt assembly gets put together and slide into the receiver?

i'll figure it out eventually (can't find anything online to help) but was hoping to get some direction..

[N_Force]

Put barrel, magazine tube and pump handle(forend-tube assembly)together, move the pump handle abit backward and allow the bolt sits in, then move it back forward all the way as the top lock of the bolt will be raised up and lock in, hold the complete assembly tie and insert back to the receiver with out forks(latches), that's it!