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Posted: 11/12/2003 7:52:38 AM EDT
I'm starting to look into buying a preban, and it seems that the majority of them are Colts. Could someone explain the different pin sizes and the sear blocks to me? Basically I just want to make sure that if I get one, I'm getting a lower that I can use with other non-Colt uppers. Thanks!
Link Posted: 11/12/2003 8:08:40 AM EDT
[Last Edit: 11/12/2003 8:12:02 AM EDT by CJan_NH]
This explains the difference between large hole and small hole uppers-about 3/4 of the way down the page [url=http://www.biggerhammer.net/ar15/uppers/]Biggerhammer link[/url] You can use any small hole upper on a large hole Colt lower with a simple, inexpensive adapter. [img]http://store3.yimg.com/I/cdnn_1757_12058557[/img] [url=http://store.yahoo.com/cdnn/arunfronconp.html]Buy it here[/url] I use my small hole Colt M4 upper on my preban large hole lowers all the time. It's a non-issue. The sear block isn't a big deal either. If you intend to convert your Colt to full auto with a registered sear you will have to spend an extra $25 to have the sear block removed-otherwise it's a non-issue. It won't prevent you from using any different types of uppers.
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