[BillJr]

First post, but I have been reading this forum for the past two years and I appreciate all the wisdom and advice. I am working on my first build and have been trying to make sure all the internals are working before I commit with the last rivets. I have a newbie question (I apologize in advance if it is one of those obvious type things) that I haven’t found an answer for using search or reading the tutorial

I am using a KMP trigger and sear. When I put the driving spring rod into the bolt, I cannot lock the rod by turning it to the right one-quarter turn unless I push down on the sear. Once it is locked, I can unlock it by turning one-quarter to the left only because the nubs on the driving spring rod catch on the top of the sear and depress the sear. I haven’t figured out how to depress the sear when the gun is assembled and bolt retracted so it creates a little bit of a dangerous situation because I cannot secure the rod before removing the back plate.

When I look at the right side of the sear (looking at the back of the bolt) the metal flange on the sear that runs up the channel in the bolt (sorry for the poor terminology) continues all the way to the top. As a result, there is no way for the left nub on the driving spring rod to rotate unless the sear is depressed.

All the pictures I have seen of the sear are from the other side so I cannot tell if the top right corner is suppose to be milled out to allow clearance for the nub. Am I doing something wrong or might I have a problem with the sear? Thanks

 

[Lucky#13]

Simple fix. You need to grind that corner off the sear so that it does not intrude, blocking the drive spring rod. A few early KMP sears had that problem. I had one and ground the corner. It works fine now, and all current sears have the clearance cut. If you have any more detailed questions, just give tomt at KMP a call.

 

[Cav Trooper]

Like Lucky13, I had the same thing about a year ago. A small amount of grinding and you're good to go.

Cav Trooper

 

[BillJr]

Thanks - I knew there had to be an easy answer.

 

[tomt]

sear clearence

bill, either it is a old style sear or your bolt is a tad different. i've had some bolts that didn't need any clearence on the sear, and some that need more ?? ( war production ?) i really don't know. but if it hangs up just like the guys said, a little grind will fix you up. or give me a buzz. thanks, hth. tomt

 

[Dave S]

bill, either it is a old style sear or your bolt is a tad different. i've had some bolts that didn't need any clearence on the sear, and some that need more ?? ( war production ?) i really don't know. but if it hangs up just like the guys said, a little grind will fix you up. or give me a buzz. thanks, hth. tomt

Tom, your Customer Service should be an example for EVERYONE to follow!!!

 

[loboslanding]

Tom, your Customer Service should be an example for EVERYONE to follow!!!

Ditto on that. Let us know Billjr if you got any more questions...that's what most of us live for.

 

[tomt]

service

i thought thats what you were supposed to do ?? thanks guys. i really wouldn't do it any other way. i wished some of my suppliers did the same. thanks again!! tomt

 

[TARGSHOOT]

tom i will 2nd the suppliers issue.....we are at the mercy of dogs ! half ass mofos