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These are STL files for 3d printed jigs to make your own DD17.2 and DD19.2 front rails. These might work for others, but those are the only two I have tried as of yet.
LBRY Tags: rails; front rail; stl; dd17.2 front rail; dd19.2 front rail
LBRY Tags: rails; front rail; stl; dd17.2 front rail; dd19.2 front rail