Sear Block???

[TimH]

Hi I'm looking around over at gunbroker.com. any way
I saw this and was wondering what it means:
"For those interested the lower is post ban but has NO SEAR BLOCK"

Thanks Tim

 

[444]

A sear block is part of a Colt AR15 lower reciever. Basically there is a solid portion of the lower just in front of the rear takedown pin. It would prevent you from using an auto-sear in that lower.

 

[FNFiveSeven]

...

It also prevents you from using a whole bunch of high quality match triggers. Gotta love colt.

 

[Monkeyleg]

blackrazor, Colt put the sear blocks in to try to stave off a ban on civilian sales of the AR15. I think your complaint may lie with some weasels in Washington.

 

[curt]

FWIW the sear block in a colt can be removed, i haven't on mine as it does not cause any problems with my accuracy speaks trigger. Also i believe the bushmasters have excess material in the same area to inhibit the installation of the auto sear, i don't know since i don't have an AS.

 

[FNFiveSeven]

Bushmasters do have extra unremoved material to prevent the installation of a GI auto-sear, but they are still compatible with after-market triggers and drop in auto sears (DIAS). Thus, if you are the owner of a registered DIAS, you cannot buy colt lowers and make them full auto as would be your legal right. Also, it is true that you can have the sear block removed, but it is a pain.

I guess I don't blame colt completely for installation of the sear block... don't get me wrong, the jerks in congress are by far the worst problem. But I would still rather see Colt stand up to them like Bushmaster, DPMS, Olympic Arms, etc. rather than cower in the corner with Smith and Wesson.

 

[David Wile]

Hey folks,

I removed the sear block in my Colt lower with regular tools in little more than an hour or so. If anyone is interested, send me an E-Mail, and I could give some detailed instructions and include some photos. It is not illegal, and I hate the idea of what the addition of sear blocks represents.

Best wishes,
Dave Wile

 

[Badger Arms]

David... I agree about the legality issue... AND SO DOES THE BATF!!!!

http://www-2.cs.cmu.edu/afs/cs/user/wbardwel/public/nfalist/atf_letter30.txt

DEPARTMENT OF THE TREASURY
BUREAU OF ALCOHOL, TOBACCO AND FIREARMS
WASHINGTON, DC 20226

NOV 5 1997 F:SD:FTB:RLB
3311


Dear :

This is in response to your letter of October 23, 1997, to the
Bureau of Alcohol, Tobacco and Firearms. In your letter, you ask if
removing the steel receiver block from the lower receiver unit of
a Colt, Sporter rifle would be a violation of Federal law.

The steel receiver block to which you refer, is intended to serve
as an anti-tampering device and prevents the installation of
various AR-15 drop-in auto sears, lightning links, and M16
machinegun fire control components. The steel receiver block is
installed in the sporter lower receiver unit by Colt Firearms and
is an attempt, on Colt's part, to prevent the illegal conversion of
their semiautomatic sporter lower receivers units into machineguns
style receivers. The presence of the steel receiver block is not
required by Federal law.

Based on our research, it is our opinion that the removal of the
steel receiver block, in and of itself, from the lower receiver
unit of a Colt, Sporter rifle would not result in a violation of
Federal law. In addition, the possession, sale, or transfer of a
Colt, Sporter lower receiver unit with the steel receiver block
removed would not constitute a violation at Federal law.

We trust that the foregoing has been responsive to your inquiry. If
we may be of any further assistance, please contact us.

Sincerely yours,


Edward M. Owen , Jr.
Chief, Firearms Technology Branch

 

[dickwholliday]

we milled out one of mine because i thought you had to to put in a jewell trigger....trigger went in on but i found out later that it was not necessary to temove it to install the jewell.....put a jewell in a buddies after mine and his had the block also and the jewell went in ok with the block in place....DICk

 

[Redlg155]

I can't stand the idea of a sear block. That pretty much has been one of the reasons I don't own a Colt AR.

Removing one is relatively simple. If you don't want to do it yourself there are folks out there like Kurts that will do the job and fill in the holes.

Removing the block will also allow you to use a "normal" bolt and not one of the Colt type bolts.

Good Shooting
Red