mpom

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

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

Thanks, Yekcoh. Actually running a M&P, very similar platform. Mark

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

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

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

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

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

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

I believe the OP is trying to shim the barrel extension onto the barrel, so barrel nut shim will not work, different dimensions. Mark

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

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

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

Unless you install a weaker striker spring, which the flatly may or may not come with, primer ignition should not change.

Another option is high temp low strength thread locker. Low strength so its not impossible to remove in future. If you place a dot of paint on bolt head and a matching dot on gas key so dots are next to each other, you will know if bolt has moved. Of course, totally unnecessary if you can locate a MOACKS tool. Mark

If a longer gas system is the answer to softer shooting, then what is the result of gas tubes with a loop or two? Sounds like a simple modification without the added weight of a longer barrel. Mark

Hamilton Bowen, Bowen Classic. If the revolver was assembled with overclocked barrel, shouldn't S&W fix it on their dime? Mark

Adjustable gas block? Replace steel/tungsten buffer weights with aluminum ones? Above should set you back less than a $100. Mark

Cannot find loading data for SP in 380ACP, anyone care to share? Thanks in advance, Mark

After trying a few muzzle brakes and finding them either too blasty or creating too much muzzle depression, I settled on the Frank Proctor brake. More blast than a flash suppressor but less than most brakes, with pretty good performance. https://www.recoilweb.com/frank-proctors-new-muzzle-device-67177.html Unfortunately hard to find today, seems Troy no longer makes it. Did get good reviews in this comparison of various brakes https://www.thetruthaboutguns.com/ar-15-muzzle-brake-shootout-3/ Mark

My wife's is also very reliable, I did tweak it some, such as reducing hammer/sear engagement area to get a cleaner release, same weight as OEM, just less creep once the wall is reached. Also built up an overtravel stop on frame behind trigger w JB Weld, filed to proper size. Sweet shooter, she is considering it for CCW. Mark

Try Apex Tactical for after market, Brownells and Midway for OEM. Mark

Apparently...

Not the OP, but he mentioned he has a Saiga, an AK patterned detachable magazine fed shotgun, so he is in Open class. Post is 3 years old...

Hope so, bought 12 lbs Mark