PA doesn't seem to have any "extra" laws regarding hi-caps, just the usual federal junk - 18 U. S. C. 921( a)( 31).
[b]PA law:[/b]
[url]http://www.nraila.org/research/19990716-FirearmLawSummary-015.html[/url]
[b]FEDERAL [18 U. S. C. 921( a)( 31)][/b]
[url]http://www.atf.treas.gov/firearms/faq/faq2.htm#o[/url]
How does the law define the term "large capacity ammunition feeding device?"
The term "large capacity ammunition feeding device" is defined as a magazine, belt, drum, feed strip, or similar device manufactured after September 13, 1994, that has a capacity of, or that can be readily restored or converted to accept, more than 10 rounds of ammunition. Large capacity ammunition feeding devices in knockdown - disassembled) condition consisting of all parts needed to assemble a complete large capacity ammunition feeding device are subject to regulation if the parts are segregated or packaged together and held by a person as the parts for the assembly of a particular device.