A few weeks ago someone had brought up a question about this.  One post had suggested that it could be done with a Dremel tool.  I thought about this for a few weeks and today a sudden streak of insanity hit me.  I took apart my Match HBar and got my Dremel.  All it took was a steady hand, patience, and no interruptions from the wife and kids.  Tomorrow, I hope to post some pics of the finished job and the remains of the sear block.  I just had to see if I could do this without sending my AR to a gunsmith.  

Porque soy un pendejo?
(Why am I a jerk?)

I moved this in here untill someone up on firearms law can let me know if removing the sear block is legal!

As you can see..I wasn't sure on the legalities of this so I moved the thread until I got confirmation. Now it's back. We return you to the show already in progress![;)]

OK could you stop with the Spanish please? I'd like to actually understand the post.

J'allais retirer mon bloc desséché de mon Colt. Mais je n'ai pas les broches à remettre au lieu des trous à gauche derrière après que je fasse ceci. Fait n'importe qui savent je peux faire ceci et obtenir un certain genre de prise.

I more or less did it the same way Boomer did.  My block was pinned on one side and also had a roll pin going through to the bottom.  I removed the selector and placed the lower on a vise block on a vise.  I started using the raised part of the block as a guide with a #409 cut off wheel.  I started with the speed at 3.  It gave me better control.  The 409's were good to start the cut into the block but they did not hold up very well.  After having two disintegrate, I switched to the heavy duty #420.  I originally considered the fiberglass reinforced #426 but I was afraid that I would cut too far down.  I used 3 - 420's.  These held up very well.  They did not shatter.  They just became smaller. I eventually had to trim a little from the raised part that has Colt stamped on it so that the head of the arbor had a straight path down.  The natural tendency of the dremel was to kick towards the mag side so with two hands I applied slight pressure toward the stock end.  I upped the speed up to 4 and slowly worked my way down.  When I was almost to the bottom, I switched to the 426 wheel.  I would vacuum out the steel dust as needed.  When I had almost cut through, I stopped.  I had cut a channel 1/16th of an inch wide which left a thin piece of metal along the pin side of the lower. The roll pin was almost gone.  I used a large punch and a hammer against the rear corner of the thin piece of metal that was left on the pin side to snap it off.  i wiggled the large piece and it came out easily and then the other piece came off the pin.  I ended up with only two scuffs on the inside of the lower.  The large sear block pin is still in place with very little of the pin left on the inside.  I was able to pull out what was left of the roll pin with needle nose pliers.  I think I covered everything.  How do I post pictures?  Seeing what is left of the sear block would give everyone a better idea of what I did.  For those of you that are wondering why I went through this trouble,  it makes upgrading the trigger group easier.  In fact you cannot install a CLE trigger with a sear block.

Gun Guru, no offense taken.  I can understand your sentiments about messing with a beautiful weapon  but I was confident that I could do this myself rather than having a gunsmith do it and wait to get it back.

Bobbyjack you hit the nail on the head!  Besides It turned out to be a pretty clean job.  If you looked at it with the upper back on it, you would never guess that the sear block had been removed. [:D]

Ja, Deutsch ist alles gute!

I'll get some pics up either late Saturday or some time on Sunday.  I'm going to the Sunset Hill Range in Henrysville PA early in the morning so I'm calling it an early night.  BTW
I was in my favorite gun shop today and got real lucky.  Two hours earlier a retired NYC cop traded a preban Colt Sporter Match HBar for something else.  The rifle looked like new.  The owner had just put the Colt up on the rack for sale.  I paid $999 for it. [:D]  

Sorry for the delay.  I did not know how to post pictures.  Hopefully this works.  If it does, I will have better pictures tomorrow.

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