Cartridge retainer?
The 12 has a cartridge tube magazine under the barrel, you mean a cartridge deflector? I've never seen one on a 12, that would belong to a 24.
The 7mm Ultra Mag is a Remington cartridge. THE model 70 is a Winchester rifle. Winchester does not chamber the Model 70 For the 7mm Rem. Ultra Mag cartridge.
If you are asking about the Remington 6.5 rem.mag round,then this cartridge takes large rifle/or large rifle magnum primers.The .223 Remington cartridge takes the small rifle primer.Both of these center fire primers differ in size and cannot be interchanged.The .223 Rem cartridge requires small rifle primers.
it is 56 Remington rifle model
The Remington Model 66 is chambered for the .22 long rifle cartridge. The most common twist rate for the .22 long rifle is one full turn in sixteen inches (1:16).
The .17 Remington cartridge would be chambered for a short action rifle.
No such model number in the Remington line
Contact Remington
No such model number
1909
Be Careful! Winchester did not make a Model 81.Remington made a model 81 Woodmaster in 30 Rem.cartridge.This is different than the 30-30 cartridge in the fact that the 30 Rem was a rimless cartridge and the 30-30 Win cartridge was a rimmed cartridge.They both headspace differently.
Remington does make a combo shotgun rifle, the Model SPR94.
The M16 assault rifle is chambered for the 5.56x45mm NATOintermediate rifle cartridge. It can also accept .223 Remington rounds.