[ARCHIVED THREAD] - Colt lightweight Sporter Question

Posted: 5/23/2014 5:49:09 PM EDT

Does anyone know what the deal is with the pins around the Safety selector? The top one looks like it might be a sear block, but looks smaller than others I've seen. The bottom one has me baffled.

http://www.gunbroker.com/Auction/ViewItem.aspx?Item=417911203

Posted: 5/23/2014 6:11:31 PM EDT

[#1]

Interesting, the Sporter Lightweight I had was just 5,000 serial numbers higher and had the full fence and the sear block pin only extruded through the right side (no pics, but thats how it was)

http://www.ar15.com/forums/t_7_158/1302300_Pre_ban_Colt_Sporter_or_EA_lower_reduced_twice_.html

Posted: 5/23/2014 6:18:06 PM EDT

[#2]

what a odd duck. it's a SP-1 carbine in everything but name.
sear block in a A1 lower?
proves the "never say never" at Colt's.
strange days indeed.

and KK if you had a partial fence, it didn't have the double slotted screw?

Posted: 5/23/2014 7:46:25 PM EDT

[#3]

Quote History

Quoted:
what a odd duck. it's a SP-1 carbine in everything but name.
sear block in a A1 lower?
proves the "never say never" at Colt's.
strange days indeed.

and KK if you had a partial fence, it didn't have the double slotted screw?

View Quote

Full fence, and I only assume the double screw was originally what it came with but it was missing.

I bought it and an SP1 lower together, I only wanted the SP1 lower, but it was a package deal. All or nothing and I really wanted the SP1 lower

Posted: 5/24/2014 2:35:28 PM EDT

[#4]

Was hoping someone had some info on this. I'm curious as to whether on not it's a factory item. The sear block pin seems off center from others I've seen.

Posted: 5/24/2014 3:27:47 PM EDT

[#5]

looks like just my 2xxx lightweight lower. not sure what the lower pin is either by the safety lever. looks legit.

Posted: 5/24/2014 3:41:41 PM EDT

[#6]

Colt made a gun that replaced their 6520, it was a full stock with a 16" pencil, most likely had a pinned sear block and still had the flat head front take down. I wonder if this isn't one of those lowers.

It just doesn't make sense even for Colt.

Posted: 5/24/2014 3:51:17 PM EDT

[#7]

Quote History

Quoted:
looks like just my 2xxx lightweight lower. not sure what the lower pin is either by the safety lever. looks legit.

View Quote

Thanks

Does yours have the off center sear block pin? The ones I've seen seem to have a larger pin that's centered over the selector

Posted: 5/24/2014 4:02:18 PM EDT

[#8]

Quote History

Quoted:
looks like just my 2xxx lightweight lower. not sure what the lower pin is either by the safety lever. looks legit.

View Quote

Could it had been installed to prevent the selector from moving to the third position? Seems to be in the correct spot for that.

Posted: 5/24/2014 4:48:14 PM EDT

[#9]

It's the pinned in sear block. Post-1989 production, where Colt was forced to drop the AR-15 name by California's first AW ban, but were still reusing Sporter II spec lowers. The SP1 was phased out in the mid 1980's and replaced by the Sporter II series, which was identical in the lower receiver to the SP1 except for the roll mark. Later Colt models eventually added the standard mag fence and takedown pin, then they went to the large FCG pin nonsense.

Posted: 5/24/2014 4:48:27 PM EDT

[#10]

Quote History

Quoted:

Thanks

Does yours have the off center sear block pin? The ones I've seen seem to have a larger pin that's centered over the selector

View Quote View All Quotes

View All Quotes

Quote History

Quoted:

Quoted:
looks like just my 2xxx lightweight lower. not sure what the lower pin is either by the safety lever. looks legit.

Thanks

Does yours have the off center sear block pin? The ones I've seen seem to have a larger pin that's centered over the selector

Exact same position as the one on the auction.