Fixed a cracked P90receiver with Super Alloy 1 Solder

Discussion in 'Gun Building, Modifications & Repairs' started by Automobilie, Dec 29, 2018.

  1. Automobilie

    Automobilie Active Member

    195
    101
    Hairline cracks on sides of rail of a used CA P90

    [​IMG]

    The Red Dot Module housing was damaged too...

    [​IMG]


    Clean off some paint to see the crack better. It was recommended to also carve the crack some to get a better fill.

    [​IMG]


    Clean, add flux, heat the part to ~350, and add solder.

    [​IMG]


    Sandblasted the part after the first round, had to re-solder after it failed.

    [​IMG]


    Careful milling, the solder smooth and sand blasting the part for paint....

    [​IMG]


    ...and after 8 attempts and the part hairline cracking along the solder every time I said screw it and milled the top flat.

    [​IMG]