Today I bought an e series 1911.I wanted to field strip it to inspect and lube as needed,but I cannot get the slide stop out the frame.Any suggestions?

It should come apart like any other 1911.

May be a tight fit, try hitting it with something

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Make sure the magazine is removed before trying to remove the slide stop pin.

Sometime I find I need to use the plastic grip end of a small screwdriver to help push them out once the slide is properly aligned.

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Any 1911 is easier to line up the notch to remove the slide stop if the recoil spring is not under tension.

This is quite true and unlike a S&W 3rd gen and earlier you can remove the barrel bushing on most 1911's by pushing down on the recoil spring plug, rotating the barrel bushing 90 degrees, and remove the spring plug. This will leave the spring hanging out of the front of the slide and a slide with no spring tension. Note on some 1911's with full length guide rods or "bull" barrels this isn't possible and it's one reason why I prefer traditional style slides and recoil springs on my 1911's. BTW, the E series is a series 70 that features a traditional slide and recoil spring. It's also a 1911 with a really superb trigger.

Tip, many 1911's are distinctly "fussy" about the alignment of the slide disassembly notch with the slide stop, if you are off by as little as 1/64 inch the slide stop will not come free. Beating on the slide stop is NOT the correct action to take. The correct action to take is to simply shift the slide SLOWLY forward and back while applying moderate pressure to the slide stop pin. When you hit the correct alignment point it will pop free. BTW the disassembly notch on a 1911 is NOT the slide stop notch, it's that tiny little notch that is forward of the slide stop notch. BTW, when the pin for the slide stop does pop free take careful note of the alignment of the notch so that in the future you don't have to shift the slide back and forth to find that magic position.

Finally if you still need guidance then Youtube will help. Because a simple search will not only provide multiple videos on field stripping but also videos on a full detail strip. BTW, the series 70 1911 has to be the easiest semi ever made to do a full and complete detail strip on, with practice you can take one down to the bare frame with a tray of loose parts and back to complete function in under 10 minutes and there are probably folks out there who can do this in under two minutes. IMO it is an example of John Browning at his very very best and a truly exceptional example of minimalist design.

Once you have the alignment notch on the slide lined up with the slide stop, I have found that sometimes the slide stop needs to be held down (like you are releasing the slide on a full magazine) while you push the slide stop out.

.Thanks for all the responses.It is my 1st 1911 and I was not locating the pin/stop in the correct position for removal.