[ARCHIVED THREAD] - Some upper questions

Posted: 2/1/2010 8:48:51 AM EDT

Are there any combinations of uppers and lowers that don't work well together?

I have a stag lower and have a Spikes 22 on top.
I want to purchase another upper for 5.56/223
My experience is that some type of mount to move the scope up and forward is needed. I was considering a Rock River vamit EOP because it already accomplishes this. Any input would be appreciated.
On my Spikes I used a Burris PERS oe something like that and it worked well, but I would prefer if it were built in. Is it about the same? My intention is to put a PS22 night vision out front of the scope so they line up (they do on the Spikes when I put it on the gas block, but 22lr is not enough for coyotes)
Any input would be appreciated

Posted: 2/1/2010 8:55:42 AM EDT

[#1]

for the most part, no, but I have one RRA lower that I can't fit my Colt 6920 upper on, it's so tight hand force isn't enough to close it

Posted: 2/1/2010 9:00:35 AM EDT

[#2]

some can be tight, RRA lowers seem to run tight (or mine do). Never had a problem making them work though.

Posted: 2/1/2010 9:06:19 AM EDT

[#3]

I don't notice combination issues between upper and lower fit, usually it's a problem concerning the having PMAGs drop freely.

Posted: 2/1/2010 9:15:12 AM EDT

[#4]

Thanks,
How about the scope mount questions / alternatives

[ARCHIVED THREAD] - Some upper questions

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[ARCHIVED THREAD] - Some upper questions

[ARCHIVED THREAD] - Some upper questions