Yes you can install the NM bushing, but would probably be useless, the id/od are very important,od too loose/good id erratic group size. Same with the op.I could go on all day, from shots stringing, to too tight an id causing the gun to jam or shearing your barrel lugs or breaking your link. If you take Richards advise on a bushing from Brownells read the instructions, and or have someone who knows 1911's check your work. You would be better off just having a PISTOLSMITH install one for you it verywell may save you a lot of trouble.SC