im looking for a mill, manual is ok at first so long as it can be converted to CNC later.. ive thought about buying a bridgeport to completely rebuild with ball screws, servo motors, etc into a four axis machine but bridgeports are very, very heavy and large and the type of work i will be doing is much, much smaller than what the bridgeports are capable of

i need a mill for firearm-related work, to build parts like receivers, trunnions, bolt carriers etc out of steel so im looking for a smaller option with those capabilities and was looking for some advice on which machines to look into?