P14/M1917 Bolt Question

[B]I recently acquired a Eddystone bolt that has a very small screw approximately 1/4 inch from the bolt face. The screw is approximately the same size as that used to secure the front sight base on a M1903 rifle. When the bolt is closed it is covered by the extractor. I have reviewed both Ferris' "United States Rifle Model of 1917" and Stratton's "Pattern 1914 and U.S. Model of 1917" and can find no mention of this screw in either. The Eddystone bolt in my M1917 does not have this screw. Unfortunately, I do not have the means to post a photo.

Any information will be appreciated.

Thanks.

i would need a picture. you can email it to me, and ill be happy to post it for you.

Attachment 29196
i belive its for an aftermarket speed lock

Sir, what exactly is a "Speed Lock"? Can you determine from the photo which rifle it is made for (P14/M17)? Presuming of course that it will headspace is it safe to use as is? [B]

Thanks for the help. [B]

speed locks do a couple things, improve lock time, and convert to cock on opening, iv seen many homemade jobs. some good , some not.
once the bolts been converted its tough to convert them back.