What documents make up my "GSA contract"?

Many documents comprise your MAS contract file. See several key documents listed below:

1. Standard Form (SF) 1449 (see example).
2. Any pages provided by the Contracting Officer attached to the SF 1449 (generally numbered 1A, 1B etc.).
3. All document names listed on the second page of the SF 1449 (these are usually Word, Excel or PDF files you attached in eOffer).
4. Final Proposal Revision or Clarification of Offer letter, submitted to your Contracting Officer.
5. Completed Solicitation document, including pricing and technical proposals.
6. Any price lists or pricing documents submitted (see example).
7. Other potential items include dated emails and SAM certifications incorporated by reference into the contract.
8. Modification requests submitted through eMod. Modifications are composed of the electronically signed SF 30 form (states Standard Form 30 in the bottom right corner) as well as any documents submitted to receive approval, such as spreadsheets, price lists, letters, or other documents reviewed by your Contracting Officer (see example). 
9. Mass modifications to your Schedule contract. These are the ones initiated by GSA, and signed by your company using a PIN provided by the Administrative Contracting Officer (ACO). A link to the completed and approved modification is sent via email to the company’s contract administrator. Mass Modifications (also known as a Schedule refresh) are often very long; therefore, we discourage printing hard copies. Instead, save them electronically in a safe place and back them up often.
10. Small Business Subcontracting Plan (if applicable). This document states your company’s intent to utilize Small Businesses to the maximum extent practicable, and outlines subcontracting goals to be met.
11. Any required records.