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Brian Enos's Forums... Maku mozo!


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    Shooting, sailing. riding my motorcycle
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    Mark Pomeranz

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  1. The thread Lior linked to discusses the internal mechanics of striker fired pistols leading to what you are describing, which is happening in all your M&Ps, to varying degrees. Have you tried dry firing with a mag loaded with dummy rounds, to create upwards pressure on the slide? That would reduce/eliminate slide movement upwards when striker is released and recoil spring becomes unopposed by striker spring. As far as overtravel , are you saying significant overtravel would not affect poi, compared w same pistol and minimal overtravel? Not arguing, just trying to learn. Mark
  2. Are the fire control components OEM or Apex? Wondering how much overtravel your triggers have and if that is the cause of the muzzle movement with the break. If OEM trigger parts, you can try to make a temporary overtravel reducer to see if this is a factor. Can use double sided tape to hold a small piece of plastic to frame behind trigger, or if lots of overtravel, maybe tie a small zip tie around trigger... All my M&Ps have either Apex parts or JB Weld overtravel "bumps" and I only see the muzzle jump in dry fire if I loosen my grip. Mark
  3. Believe Apex has 2 sear springs, and I prefer the purple over the yellow. Puple one is actually stronger than OEM. Prefer it because the trigger pull with stock springs and Apex parts ends up at around 3.5 lbs. That is great for competition but 2 of my M&Ps are carry guns as well as IDPA match guns so prefer trigger pull closer to 4 lbs. Mark
  4. Thanks, Yekcoh. Actually running a M&P, very similar platform. Mark
  5. Any info on going from a typical OEM 17# to a 13# wrt to the questions the OP raised? Would one expect more red dot movement and frame battering? My very limited experience showed less gun bounce and perceived dot motion going from 17 to 13# recoil spring, single session, single handgun. Mark
  6. More details would be very helpful. Can you check and see if trigger resets with the slide off? That is, pull trigger towards frame hard, while keeping it there, push trigger bar to right so it disengages from sear. Then slowly release trigger and see if loop reengages the sear. Another possible issue is the striker not catching on the sear, thus no reset. Can you determine which scenario is occuring, or if its a different one altogether? Mark
  7. Suspect most here do their own installs and adjustments of Apex trigger components, and would be glad to offer help in diagnosing and correcting your issue, if you are interested, but if you want a gunsmith, suggest you check w Apex for a recommendation. Mark
  8. Maybe only 1 person mentioned the C3 early on, but I'll bet at least half a dozen have purchased one based on this thread. I know I did and suspect more did, based on requests for the discount code. Mark
  9. Agree, and at 25K rounds plus probably a bunch more of dry fire mag changes, not surprised a spring goes tits up. Makes sense to change all the springs in the gun and magazines. Mark
  10. I wonder if the bolt is actually pushing the new shell forward, only to have that shell not chamber, but stop dead, causing the bolt to bounce back and then get hung up on the next shell coming up from magazine. Suspect if the shell that stopped cold would have been chambered the bolt would have followed and locked. Can you reproduce this issue with dummy rounds? Have you checked for any sharp edges at chamber mouth that could catch the shell as it attempts to enter chamber? Mark
  11. I believe the OP is trying to shim the barrel extension onto the barrel, so barrel nut shim will not work, different dimensions. Mark
  12. Thats what I did for a friend. He got the kit which included springs and new sear and striker block. Trigger pull became smoother but not much lighter. Ended up removing some material from the sear to reduce engagement with striker, now its acceptable. Mark
  13. Sounds like you neeed to make a shim to take up the space, thus achieving reasonable torque between the barrel and barrel extension, prior to installing the pin. There are shims available for shimming barrel extension to front face of upper receiver, don't know if the dimensions match what you are seeking https://www.brownells.com/rifle-parts/barrel-parts/rifle-barrel-hardware/washers/barrel-nut-shim-kit-prod96013.aspx, https://www.brownells.com/rifle-parts/barrel-parts/rifle-barrel-hardware/washers/barrel-nut-shim-kit-prod96013.aspx If not, 0.001 stock is very thin, can probably be cut with sharp scissors, just prone to bending and tearing, may want to use weak glue to attach to thick paper prior to cutting it to shape, so its easier to control. Let us know how it goes. Mark
  14. I dont know what Apex recommends but its easy enough. I first measure the opening with a feeler gauge, pick one 3 or 4 thousands smaller, place it in the opening and squeeze down, top of candy cane to the flat bar below with a smooth jawed pliers. The feeler gauge limits the new opening so its not squeezed closed too much. Rinse and repeat to get the results you want, but be forewarned that doing the above reduces overtravel, and you want just a bit. Mark
  15. Unless you install a weaker striker spring, which the flatly may or may not come with, primer ignition should not change.
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