Sear Housing Block Q

[Catmonkey]

I've got a few M&Ps and recently purchased a few new sear block housings for my 9mm and 40s to use the larger plunger. To my surprise my 9mm Pro had the 1/8 plunger. I installed the Apex forward sear and trigger kit in it and can't wait to try it out.

I also have a couple of .45s M&Ps. I'm under the impression these use a different sear block housing than the 9/40 frames. I now have an extra sear housing block and I'd like to put in one of the .45s if they are one and the same, but I see conflicting info on this.

 

[427mach1]

I believe they are all the same. Check G & R Tactical and they list the same housing for all three.

S&W Sear Housing Block with PC SEAR at G and R Tactical

 

[Catmonkey]

That's were the confusion comes in. G&R shows it like that but Midway and Brownells seem to distinguish between the two. Further confusion comes about as to why Apex has different sears between the .45 and other models.

 

[Catmonkey]

I contacted Apex to see if they could help me. Here is what I learned. It may help someone else.

All .45 models are all Thumb Safe Compatible/Active versions of the Sear Housing Block.

All Sear Housing Blocks are either Internal Locking System Compatible/Active or Thumb Safe Compatible/Active. The Internal Locking System Compatible/Active sear block will have the hole for the key mechanism (or plugged) in the left side of the frame. The Thumb Safe Compatible/Active sear block housing will have the thumb safety or the square cuts outs in both sides of the frame with plugs.