Patriot window pivot bar 265 A

I own a Carter Grove model built by NV Homes. I have Patriot windows installed in this home built in Dec 2004 (windows are the tilt type), but I do not know the Series number for these windows. My problem is the small piece on the left side of the upper bedroom window is broken. the piece appears to be lead, and fastened by a screw at the bottom - I assume its function is to hold the window in it's runner as it it is raised and lower. In it's present condition, when the top window is tilted, the bottom portion of the window comes out, creating a major problem in trying to clean and reinstall. By chance, can you identify the part from the above description? The bar (piece) is 1/4 inch in width and appears to slide through a gray holder opening which is missing, but may be on the runner which is not visible.

Thanks for your assistance.

Hayden H.

Whew, what a job to get a sample part to photo! I believe the part is the pivot bar. The part I removed from the left side of the top window is 2.5 inches in length, and has the number 265 A on it. I removed the broken part from the right side of the top window and it has the same number, 265 A on what is left of the part. The attached photo is a copy of the part from the left side of the top window.

Thanks for your assistance

Okay, have the pivot bar installed. What is the secret to reinstalling the window? There must be a trick as I have tried numerous ways to get the window back into the runners in the frame, but to no avail.

Thanks again for your assistance and patience.