So here is the skinny on the difference between DSR, Special provision for MRT technicians and Disability. You will get a DSR retirement if you have 20 years of service including military buy back and are at least 50 years old or any age and 25 years of service including military buy back. you will not receive the Special Retirement Supplement until you hit your MRA. Supplement = years of service(including buy back) / 40 X (social security retirement amount at 62). If your a MRT technician and have 20 years of (in seat, dual status) no military buy back service and are at least 50 years old, you get the SRS immediately or any age and 25 years of in seat dual status service with no military buy back. Once you are out of civil service and on day 31 of retirement, you can apply for disability retirement consideration directly with OPM and bypass your state HRO. My suggestion is to hire an experienced attorney that will handle your paperwork and fight for your disability retirement consideration with OPM. This can take a long time to process but the good thing is at least your getting some sort of retirement while your waiting for your disability to go through OPM. you only have 1 year from the time your received your retirement, the date is on the last SF 50 the HRO processed for you. Also once OPM has decided on your Disability, payment is back dated to the date you filed and back pay is offset with what you received from your DSR retirement.