Mid Ohio Services Posted December 18, 2018 Report Share Posted December 18, 2018 Hi, seen a listing on Gunbroker for an 80% approved prototype Philadelphia Ordinance M1A1. My questioned is I didn't thinkthere are receivers available and I sure don't know what the 80% means. I know someone here can explain it to me. Thanks so muchRandy Link to comment Share on other sites More sharing options...
benedw60 Posted December 18, 2018 Report Share Posted December 18, 2018 Pm sent Link to comment Share on other sites More sharing options...
bob241 Posted December 18, 2018 Report Share Posted December 18, 2018 All information available at web sight listed below. http://philaord.com/80-machined-receivers/m1921-m1928-m1928a1-m1-m1a1/ Link to comment Share on other sites More sharing options...
Adg105200 Posted December 20, 2018 Report Share Posted December 20, 2018 (edited) Basically, for Thompson's it means that the inside of the receiver hasn't been milled out for a bolt. So it can be used as a display receiver with original trigger frame, barrel, stock etc. Or it can be used to make an approved design semi auto I believe. Andrew Edited December 20, 2018 by Adg105200 Link to comment Share on other sites More sharing options...
Mid Ohio Services Posted December 20, 2018 Author Report Share Posted December 20, 2018 Basically, for Thompson's it means that the inside of the receiver hasn't been milled out for a bolt. So it can be used as a display receiver with original trigger frame, barrel, stock etc. Or it can be used to make an approved design semi auto I believe. Andrewtks: andrew i have complete m1a1 that we cut the rec. just thought there was a chance that that one could be registered. guess its just a parts kit. tks. again Link to comment Share on other sites More sharing options...
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