Well, you are a New Guy here, so I will help you out a bit.
Don't take this personal but your request is like saying "I have a Car, can you tell me what motor fits it?" There is simply not enough information in your question.
There are several "Enfield" rifles. The Commonwealth countries used the Short-Magazine Lee-Enfield (SMLE) in mostly the Number 1 Mark III* form. During WWII, they used the Number 4 Lee Enfield rifle. There was also the Pattern 14 Enfield and the U.S. Model 1917 Enfield rifle in 30-06 Calibre.
As you can see, we now have FOUR different rifles, so we have to identify which one you have.
Absolutely the best way to have something identified is to post pictures. There are "stickies" here to tell you how to do that.
Also, there should be markings on the rifle and this will possibly help you identify the model. If the original sights have not been removed, then there is a fairly "quick and dirty" method of identifying your rifle. First of all, does it have a detachable magazine? If it does, it is of the Lee system. Is the safety on the right side or the left side. Right side is Enfield M-17 or P-14. Left side is Lee Enfield or SMLE. Second --is the rear sight mounted on the rear of the receiver, (peep sight) or is it mounted halfway up the barrel? If rear sight is an open sight, mounted half way up the barrel, it is probably a Number 1 Mark III type. If so, look on the right side of the steel butt socket in the area just back of the bolt handle and it should have some markings on it, such as "GR, No.1 Mk.III*" or similar. If it is a No. 4 rifle, there MAY be markings on the flat on the left side of the receiver or on the left side of the butt socket.
In the case of the Lee system rifles, there are "no gunsmithing" mounts that are available for ORIGINAL standard rifles. If someone has ground off some of the area where these mounts need for securing it to the rifle, then obviously these will not work with a modified rifle.
So, the main thing is to positively identify your rifle, then we can go from there and help you out.
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