"I don't know about 999 or where he got his information"

Couldn't be easier Christmas - Just Google Syrian Armed Forces - Then:

Step 1: Select Syrian Army
Step 2: Select Section 3 Equipment
Step 3: Click on Modern Equipment and Uniform of the Syrian Army and that takes you to - Equipment of the Syrian Army
Step 4: Select Section 12 deals with Small Arms;
Step 5: Select Sub-Section 12.4 which details Sniper Rifles used by the Syrian Army

And the list is:
Dragunov SVD - Russian
PSL - Romanian
Zastava M91 - Serbian
Steyr SSG 69 - Austrian

See dead simple.

On the other hand Google - UK Arms Sales to Syria - And you get -

FUCK ALL