I have 1000 AGBR targets on the shelf and a Daystate CRX in a custom metal BR stock in the safe so I know what BR is [ not to mention 2 Halls, a 40X , a Suhl , a KK200 Walther rimfires: 30BR Viper, 6Beggs 40X cf. ]. I started this thread to hopefully get some discussion about air rifle building...