ARs with no sear block?

[birdv]

I though only prebans had no sear block.

Is this true????????????????

 

[Zak Smith]

No.

Colt put a sear block in some rifles to prevent installation of an auto-sear.

The block is not required by any law, and no other AR manufacturer puts them in.

-z

 

[chink]

I have been told that the bushmaster lowers have a portion which is unmilled that effectively acts as a sear block. I think several manufactures do this.

 

[Wildalaska]

What difference does it make

WildsowhatAlaska

 

[glocksman]

It makes a lot of difference if you're trying to install 'da switch'.

 

[Wildalaska]

If ya aint Class 2 ya cant put da switch in anyway

If you are Class 2 who cares about the block

WildeasyfixAlaska

 

[ny32182]

I have been told that the bushmaster lowers have a portion which is unmilled that effectively acts as a sear block. I think several manufactures do this.

I don't know about this, AFAIK Colt is the only one that insists on a sear block. The "shelf" in my Bushies and LMT look the same height to me. There are a couple of differences that I was surprised to find. The LMT has no small hole in the front pivot pin detent spring channel like there is on Bushmaster, and a portion of the right wall of the receiver is thicker on the Bushmaster. Not sure what thats about. I would think the LMT would be mil-spec without the autosear pinhole, and thats it.