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AR15.COM
8/21/2001 5:14:51 AM EDT
How can I tell if my rifle has a sear block, what do they look like and where are they located, pic would be great.  Thanks in advance.(Its a Colt, model 6520, Government Carbine)
8/21/2001 5:23:49 AM EDT
[#1]
If it is a newer Colt then its a pretty good bet that you have one.

I don't have a pic, but its pretty easy to tell. You will either have a small block of metal that is pinned right behind the trigger/selector area or it will just be an area that has not been milled out. All of the ones that I have seen extend completely to the top of the lower receiver.

If your lower does not have a block it will just have one "channel" milled out in the lower receiver. If it does have a block it will look like one larger channel with a much smaller one towards the rear.

Michael
8/21/2001 5:53:36 AM EDT
[#2]
[img]http://albums.photopoint.com/j/View?u=287906&a=2140589&p=53199301&Sequence=0&res=high[/img]



Unblocked/Blocked




Nuckles.
8/21/2001 5:57:41 AM EDT
[#3]
Nuckles,

What kind of lower is that on the right? Ive never seen one blocked like that.

Michael
8/21/2001 6:04:33 AM EDT
[#4]
I take it back, Ive got an OlyArms in the safe that looks exactly like that. It just looks a lot different in the picture.

Never really thought of it as a block, since the one in a Colt really so much different.

Michael
8/21/2001 12:21:29 PM EDT
[#5]
That is not a Colt sear block
Wish I had a working digital camera
cpermd
8/21/2001 7:07:55 PM EDT
[#6]
The sear block comes across the rear of the receiver channel to prevent a drop in auto sear.  When you look into your receiver you'll know that it has one.

8/21/2001 8:29:46 PM EDT
[#7]
Can't find the damn image of Colt's "hardened steel"  [i](voluntary)[/i] block, [i]I've got it around here somewhere[/i].

[img]http://www.biggerhammer.net/ar15/uppers/searrelief_ar15_m16.jpg[/img]
8/22/2001 11:09:47 AM EDT
[#8]
Yeah
That's it
cpermd
8/22/2001 5:20:35 PM EDT
[#9]
I just picked up a pre-ban Colt that has a big block of added-on (after the lower was milled).  It has a different (slightly) color parkerizing on it and it's stamped Colt.  If I remember correctly, my post-ban Armalite has nothing.  (My dad borrowed it so I can't check to be sure.)  This block is to insure that a full-auto sear cannot be installed, correct?