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blackjack_03
01-15-12, 13:49
I picked up a 2-position receiver extension. It doesn't have any markings on it. It is milspec and came with the oldstyle lock ring. Any ideas?

Quiet-Matt
01-15-12, 14:54
I believe the old Colt SP1 carbines from the 70s and 80s had these...
http://pullig.dyndns.org/retroblackrifle/sitebuilder/images/BufTub-448x95.jpg

http://pullig.dyndns.org/retroblackrifle/sitebuilder/images/CastleNut-105x207.jpg

ST911
01-15-12, 14:58
Seen on early Colt carbines, but not in some time. They were available in the CMMG and other bargain bins for a time for cheap.

blackjack_03
01-15-12, 15:37
Thanks. I bought it from a local surplus store that sells alot of surplus uppers and parts and thought it might be a colt part.

ST911
01-15-12, 17:23
I don't know if others made them too, but I know they were on some of my Colts, and were verified as coming from others.

Scott likely has more information and could more easily verify.

mrf2
01-15-12, 17:35
They were made several companies in both military and commercial diameters. Two position buffer tubes were the only type of tube until the 1990s. It should be worth a good bit of cash even if it isn't Colt. Because yours is is the military diameter I would suspect Colt.

blackjack_03
01-15-12, 18:57
How much would they be worth? The place has 2 more with the stock for $30 although i dont know if they are milspec or commercial and one has a purpleish blue finish.

scottryan
01-17-12, 10:24
Thanks. I bought it from a local surplus store that sells alot of surplus uppers and parts and thought it might be a colt part.




Can you post a picture of it? Is the keyway ripped out?

Its worth somewhere between $0 and $100 until you can tell us more.

blackjack_03
01-17-12, 13:57
Ok, here are some pictures. Didn't have a chance to do it until today.

http://i1224.photobucket.com/albums/ee376/mrflynn11/005.jpg

http://i1224.photobucket.com/albums/ee376/mrflynn11/IMG_0282.jpg

http://i1224.photobucket.com/albums/ee376/mrflynn11/IMG_0281.jpg

http://i1224.photobucket.com/albums/ee376/mrflynn11/IMG_0279.jpg

scottryan
01-17-12, 14:04
The tube is Colt.

The lock ring and backplate are not Colt.

You didn't take a good picture of the keyway. Remove the lock ring and backplate and take a picture of the keyway.

blackjack_03
01-17-12, 14:19
ok, I am assuming this is what you mean by the keyway.

http://i1224.photobucket.com/albums/ee376/mrflynn11/004.jpg

jtb0311
01-18-12, 22:34
Are the stocks themselves fiberlite or aluminum? If aluminum, they're pretty rare and are worth some $$$, even if they're reproductions.

scottryan
01-23-12, 13:51
ok, I am assuming this is what you mean by the keyway.

http://i1224.photobucket.com/albums/ee376/mrflynn11/004.jpg



Since the keyway is not ripped, it is worth somewhere between $75 to $100.

blackjack_03
01-24-12, 10:01
I will have to see if there are any more then. Thanks for the info.


This came with an unmarked fiberite stock with the ribs. I sure wish it was aluminum though.