NOC 1911 Castings.
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Thread: NOC 1911 Castings.

  1. #1
    Gunco Rookie Bones's Avatar
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    Default NOC 1911 Castings.

    I put my VERY first 1911 build together and neither the hammer nor the grip safety will work properly, so I tore it apart and this is the only conculsion I can draw. Anyone else have problems with the sear spring hitting the frame casting and not engaging the sear so that the hammer will cock back?

    Bones

  2. #2
    Gunco Member dinger's Avatar
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    just a quick check (i have put 2 together now and not had much trouble apart from some minor fitting of the assemblly parts) do you have the sear seated properly before you put the sear spring in I did this once where the sear spring went behind the sear this stopped the hammer from cocking as for the grip saftey I have had to trim the sides down on both to get them to move freeley, only about 005" aside. the fitting might seem like sucking eggs but I still forget to check the position of the sear befor I put the spring in and it still catches me out now and again.

  3. #3
    Gunco Rookie Bones's Avatar
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    Default Update.

    Checked that and I'm OK there. I moved the spring down about 1/32 of the actual postion that the sear spring is supposted to sit and then bracing it with the mainspring assembly... The werid thing is that it worked fine after doing this. Not sure what is going on here since I already trimmed the area that you described.

  4. #4
    Gunco Member Merkava's Avatar
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    I put one together with a Kristi frame and could not get the sear to engage the hammer.I thought it was the frame at first.I replaced the sear and it worked fine after that,it must have been out of spec.Both sears were brand new but I once read that all these drop in parts are a mixed bag. Well anyway...good luck

  5. #5
    Gunco Member dinger's Avatar
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    I'll agree with that some of the "fitting" i had to do was with the sear, it would lock by hand but when racked theb hammer did not move enough to engauge the sear! so it was a case of filing the seat tip so it was short enough to catch the hammer.

  6. #6
    Gunco Rookie Bones's Avatar
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    Default That sounds like the problem.

    Could you please elaborate? I pushed on the sear with a screwdriver and it would engage the hammer no problem but I put the spring in the keyslot that was cut for it and the spring would not push the sear down enough to engage the hammer.

  7. #7
    Gunco Member dinger's Avatar
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    when you rack the slide back does the hammer fall back into half cock? if it does this could mean that the hammer does not get enough pivot back to allow it to engauge the full cock i.e. the second notch on the hammer.assemble the sear and the hammer outside the frame with the pins holding them in there relevant positions to each other and then pull the hammer back to as near the same position it would go to if it was racked by the slide and see whats happening. you may need to trim/shorten the sear tip to allow them to engauge.Don't go too far as you may well end up with a full auto pistol!!!!

  8. #8
    Gunco Rookie Bones's Avatar
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    Its not an issue of having a sear that is too tight. When I put the spring in the keyslot cut for it the spring does not engage the sear properly but if I move the spring down about 1/64 below the keyslot the spring engages the hammer with tension no problem. Any ideas?

  9. #9
    Gunco Rookie Bones's Avatar
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    Default Ok.

    I messed with it a little more today and besides destroying my sear spring I think I found out what is going on. The top of the sear spring sat firmly against the sear bar that sticks out and when the hammer was cocked back to allow the sear to travel the sear spring held the sear in place. Since the sear has to rock towards the inside of the frame it could not because of the upward tension of the spring against the sear. This in my mind can mean one of three things 1) Sear spring out of spec (change spring) 2) sear out of spec (trim sear bar to allow travel or 3) sear hole in frame slightly too low.

    Any comments folks?

  10. #10
    Gunco Rookie Bones's Avatar
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    Default Solution!

    Got my new sear spring today. This time I just shaved a very slight amount off of the spring arm that depresses the sear, not the "hooked" part but the flat part and it works like a charm now!

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