Your employer negotiates with 401(k) administrators, like Fidelity, to provide options to employees for the investing of their retirement money. If the employer chose to, they might add an option for an annuity, but it is unlikely. I don't believe they could do it with Fidelity, and would have to add or change administrators.
In your situation, I would decrease the amount I was contributing to my 401(k), and set up an IRA of my own, possibly with that annuity you mentioned. Investigate the fees and account restrictions associated with an annuity carefully -- 10% sounds a bit too good to be true in the current investing environment.

Fidelity Investments has many, many funds you could invest in. If your employer matches with you they are also giving you a gift of the match. Generally annuities are not a good investment, with lots of fees and rather anemic return. In the long run you will be much better off with Fidelity.

How can I get our employer to give us more choices in the 401-k plan? we are stuck in fidelity, losing money, and I prefer some other companys fixed products. the IRS allows it why can they change their trust agreements?
gary