renegadecow Posted November 2, 2016 Report Share Posted November 2, 2016 Because reasons, I've been tasked to convert a PPS M870 to accept APS CAM870 shells. Went surprisingly easier than I anticipated: all that needed doing is reprofiling the extractor a bit and modifying the firing pin and chamber depth. I put in a barrel sleeve to get the right APS bore but I suspect it would work without it and just loose some fps. That said, I haven't fired it yet, heck I haven't even assembled it as I'm still waiting for the epoxy to cure. Don't want that barrel sleeve shooting out and poking a 3/4" hole in someone. Link to post Share on other sites
blobface Posted November 2, 2016 Report Share Posted November 2, 2016 Because reasons Which is that APS shells are the only correct type of shotgun shells in airsoft... Especially more so when V2 with top charging shells instead of having to use those crazy charging "docks" are released.. Link to post Share on other sites
wildething Posted November 2, 2016 Report Share Posted November 2, 2016 hi could you tell me the length of the of the pps ejection rod? I am repairing one thats missing that bit and i cant find it any where Link to post Share on other sites
renegadecow Posted November 3, 2016 Author Report Share Posted November 3, 2016 It's 93.40mm long. Link to post Share on other sites
DEVILHUNTER Posted November 7, 2016 Report Share Posted November 7, 2016 Nice mod. What barrel diameter did you use? I moded my barrels to be 17mm inner diameter. How did you atached the mag tube ring to the barrel? That's the only point is failing to me. Tried screwing and epoxy but it keep failing with the heavy racking. I may try aluminium brazing or even TIG welding. A nice aluminium (or even steel) chamber for the Tanaka/PPS (and of course buckshot version) is on my "to do a small batch" project list. I already did the prototype and worked pretty well. Link to post Share on other sites
renegadecow Posted November 8, 2016 Author Report Share Posted November 8, 2016 Used a piece of curtain rod out of stainless steel at 17.30mm ID. Ring is just epoxied on, but the slide pump doesn't come into contact with it. It bottoms out against the bracket holding the back of the mag tube and the bolt against breech first. Link to post Share on other sites
AG1212 Posted November 27, 2016 Report Share Posted November 27, 2016 Would it be possible to modify 6 shot PPS shells to work in a CAM870? Link to post Share on other sites
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