Worth checking out Gene Malkoff's Drop in Module.
Not 100L, more like 230L but a 3 hr run time... and only $60 http://malkoffdevices.com
I have two he sent me for testing and after putting over 10,000 rds through them now and beat them to hell...I am very much happy, besides Gene is just a hard working American and good people. Made in the USA and guarantees it or money back no matter what.
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