This magazine features a body made from .027" aircraft grade certified 17-7 PH stainless steel and is heat-treated for maximum durability and service life. The magazine spring is specially fabricated from high tensile strength wire for enhanced feeding and is able to remain fully loaded for long periods of time without damage. Features a fiber-filled nylon self-lubricating follower and removable base pad.
If the grips on your 1911 measure 4" long, you have a Government/Commander length grip. If the grips on your 1911 measure 3-1/2" long, you have an Officer/Defender length grip.