Yes, the chambers are for 2 3/4 in. shells. So far, no one has made a 3 in. 16 ga. shell. I have been told that 16 gauge shells have been made in shorter than 2 3/4", but I have never seen any. Hope this helps.
Sold by Sears Roebuck. Probably manufactured by Stevens.
Probably Harrington & Richardson
Stevens Arms made the Ranger shotgun for Sears & Roebuck. Production ended about 1930.
Up to $125.
0-115 usd
Marlin Mdl 81
50-100 USD or so
It's a Stevens 520 with a Sears name.
Usually will not go beyond 100 USD
Sears Roebuck co.
As of 2014 there are a few places where one can buy parts for the Sears Roebuck 20-gauge Ranger 105-21 shotgun. These parts can be purchased through local gun dealers and through gun auctions.
The model 36 is a Marlin Model 80.