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Posted: 9/26/2004 9:15:39 PM EDT
Hi just wanted to see if anyone knows of any problem with mating a Bushmaster M4 patrolmans complete upper with either an Ameetec or RRA branded lower? Are there any pin size differences or anything else to be concerned about?

Link Posted: 9/26/2004 9:27:13 PM EDT
I believe you should be able to mate the Bushmaster upper with just about any decent lower like the ones you mentioned.
Link Posted: 9/26/2004 9:56:17 PM EDT
Thanks for the info already put one on order and just wanted to do a quick sanity check to make sure that it will work with one of the lowers I have :) Looking forward to making my own M4 with collapsible stock.
Link Posted: 9/26/2004 11:54:09 PM EDT
You will be fine doing what you suggested, but dont be surprised when you discover that RRA lowers have a really tight fit. (Reall Really Tight) Which is a good thing. It will lossen over time anyway.
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