If you are talking about the Smart Parts gas thru gagit grip, it has the gas tap half way up the grip. This requires a 90* fitting (and you normaly have a 90* on the reg.)
If you order the grip with the gun, it would be installed for you and you would not have to worry about fittings. By the way, that is NOT a Macro line fitting-- it a "Shocker line" fitting (bigger)
Personaly i prefur a stright gas thru grip like the Kapp. this as the gas tap on the bottom so it dosn''t interfer with your fingers. they are advaible in black and chrome and several colors.
If you are looking to things to get with your gun, you should consider a trigger job-- again best bought at the time you buy the gun
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