This were built at CAS Base Gagetown by a Weapon Tech to make a stiff one piece mount. A C3 PVS 502 one piece base was modified for a pair of Parker Hale RALS.4 rings, hand fitted to the C3 and lapped. I sure this was time consuming; they are rugged; well built. Each base as marked with the C3 serial number. Parker Hale developed a one piece base for the C3a1 and the M85 similar in concept however you do not see many on the market. Rare and Pricey.

Ron (Canadaicon)