[stfesta]

This information is taken from AR 40-501, Standards of Medical Fitness (latest edition).

Chapter two, concerning initial entry and the reference to all other chapters (under SF physical it will say, reference chapter 2-9 etc...)

c. Leg, knee, thigh, and hip.
(1) Current loose or foreign body within the knee joint (717.6) is disqualifying.
(2) History of uncorrected anterior (717.83) or posterior (717.84) cruciate ligament injury is disqualifying. History of surgical correction of knee ligaments is disqualifying only if symptomatic or unstable (P81.4).
(3) Current symptomatic medial and lateral collateral ligament injury is disqualifying. (4) Current symptomatic medial and lateral meniscal injury is disqualifying.
(5) Current unspecified internal derangement of the knee (717.9) is disqualifying.

Chapter five, concerning initial entry into Special Forces.

f. Extremities.
(1) Paragraphs 2–9 through 2–11.
(2) Less than full strength and range of motion of all joints.
(3) Loss of any digit from either hand.
(4) Deformity or pain from an old fracture.
(5) Instability of any degree of major joints.
(6) Poor grasping power in either hand.
(7) Locking of a knee joint at any time.
(8) Pain in a weight–bearing joint.
(9) Retained hardware that is integral to maintaining fixation or stability, or presents a risk to mobility or a risk of further injury by its presence.

Based off the AR, if you have no range of motion issues, no function issues, and no ongoing injury you will be good to go.

Disclose the previous injury on the 2807, discuss it with your health care provider, and drive on.

Just an FYI,
The standards for retention are different than initial entry, which is important to realize. Retention standards are, for the most part, not as rigid, for example: you have to have a spleen for initial entry but, you don't need a spleen for retention. Your recruiter and your health care provider will know this or a least look it up. The issue may come if you are talking with someone who is confusing the two, usually an uninformed outsider who didn't make it or was never there, claiming to be a SME, just giving out "good advice".

If you are ever in doubt, look at AR 40-501.

Hope the information helps,
sf