Take it to a gun smith.
If your Revelation 150 is a tube fed semi-auto .22 rifle, it was likely made for Western Auto by the Marlin Company, and is a Marlin Model 49. Depending on the part you need, you may find it at gunpartscorp website, or check with a gunsmith.
50-150
value of revelation 12 guage 350 a
10-125 usd
50-150 USD or so
The Savage Arms Revelation model 115 is worth $150 in good condition. Revelation was a Western Auto name. The Western Auto is really a Savage 46.
Try gun shops, gun shows, egunparts, Brownell's, MidWay USA, Shotgun News
0-150 USD
No published sn data.
It is a Marlin Model 49, made for Western Auto.
No published sn data.