Ruger 556 interchange?
Will the ruger sr556 upper and lower interchange with other AR rifles?
I don't own one, but I'm pretty sure it will.
I have a SR 556 and it is a mil-spec lower that will interface with any mil-spec upper.
Thanks,what larger biggame caliber's could i get besides the .556 that would work with the lower?would the 243 or 308win. be to big?
6.8SPC works with a regular mil spec lower. 308 uses a larger magazine so lowers are different.
It sure does.
Don't forget .458 SOCOM!
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