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Posted: 6/11/2003 3:49:33 PM EDT
OK. I want to get a 9mm upper, probably a RRA, to attach to my stock post-ban Bushy lower. Also, I want to use the two-piece mag-well block so I can use Sten mags.

My questions:

I will need a new hammer or a ramped bolt to make it work, correct?

Will either of the above mods affect the operation of my factory 16" Bushy upper?

Sometime in the future I would like to make a SBR from the 9mm upper. Any advice?
Link Posted: 6/11/2003 4:13:16 PM EDT
[Last Edit: 6/11/2003 4:14:05 PM EDT by joeblack]
Originally Posted By Fly320s: OK. I want to get a 9mm upper, probably a RRA, to attach to my stock post-ban Bushy lower. Also, I want to use the two-piece mag-well block so I can use Sten mags. My questions: I will need a new hammer or a ramped bolt to make it work, correct?
View Quote
Yes
Will either of the above mods affect the operation of my factory 16" Bushy upper?
View Quote
No, ramp the bolt and you don't need to mess with hammers. Ramping saves the hammer pin too.
Sometime in the future I would like to make a SBR from the 9mm upper. Any advice?
View Quote
Here's my 9mm upper (bottom pic) Took a RRA 16" cut it and threaded it. (top pic is a 7.62 x 39 upper, did the same to it) Both are used on a Colt M16A1. [img]http://users.zoominternet.net/~picplace/7629mm.jpg[/img]
Link Posted: 6/11/2003 4:17:01 PM EDT
Thanks for the quick response, Joe. I only have the one lower for now so I don't want to mess with it's operation.
Link Posted: 6/11/2003 6:27:37 PM EDT
[Last Edit: 6/11/2003 6:37:58 PM EDT by SBR7_11]
Read this thread carefully, all the hammer-ramp issues are discussed in there. [url]www.ar15.com/forums/topic.html?b=3&f=15&t=161635[/url] and [url]http://www.ar15.com/forums/topic.html?b=3&f=15&t=162134[/url]
Link Posted: 6/12/2003 10:40:06 AM EDT
Looks like it would be easier just to grind the hammer down a bit than ramp the carrier. Is that possible. Rounding the hammer yourself? Joe
Link Posted: 6/12/2003 1:07:26 PM EDT
Some people have reported doing it, but you lose the surface hardness where you remove material.
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