years ago rem 870 tb, stood for trap with b grade wood. tc stood for trap with c grade wood. tc trap wood has a slimmer pistol grip to reduced the weight of the better figured wood. when the price of 870 trap guns started to get a little pricey, rem came out with the ta model trap gun with plan jane wood. these guns shoot basically the same. when you see a rem trap gun made in the 50's early 60's the rib will be a little different. the chokes are longer and these guns tends to shoot a little higher. when rem came out with the competition models, they redesigned the dimensions of the stocks. they made the straight stock, meaning non montecarlo, higher than the monte carlo stock. when rem was starting to get ready to produce their barrels with choke tubes, they first came out with a thicker barrel in the choke area without choke tubes. these guns come with a bigger bore and a dime will fall through the barrel. these are still full choke. if you can ever get this barrel, no other 870 barrel compares to this particular barrel. i don't know what rem was thinking when they came out with their choke tubes? the choke designation did not conform to the standard industries diminsions, as full, im, m, etc. most people including myself feel rem made a very poor choke tube. most people i know switched from rem tubes to another brand. i have owned every 870 made in trap except for the F grade.
steve balistreri
rem 870 collector