Yes it uses rem chokes and comes with a set of 3 (Full,Mod,IC) it is a 3 inch chamber so it will fire both 2 3/4 and 3 inch shells specs UPC:
047700820897
Description:
REM 870 SHTGN LTD 12M/26MC GLS
Brand:
Remington
Model:
870 200th Anniversary
Type:
Shotgun: Pump Action
Caliber:
12 Gauge
Finish:
Blue
Action:
Pump Action
Stock:
C Grade Walnut
Sight:
Front & Center Bead
Barrel Length:
26 Vent rib
Overall Length:
46 1/2
Weight:
6lbs 8oz
Capacity:
4+1
Safety:
Cross Bolt Safety
Receiver:
Blue Engraved
Chamber:
3
Chokes:
Multi-Choke (Full,Mod,IC)
Features:
Limited Quantites Produced, Special Serial Numbers;
Engraved, Gold Inlay Receiver, 200th Anniversary

Robet, this shotgun is has a 3" chamber and will fire 3", 2.75" and anything shorter such as Aguila mini shells without issue. This package Includes: - 3 RemChoke Pattern Choke Tubes: Full, Modified, and Cylinder - Commemorative Bicentennial Box with Historical Remington Timeline < BR> Certificate of Authenticity - Special Unique Serial Number .

Yes, that model has a 3" chamber for 2.75 or 3" shells and the barrel is threaded for Rem chokes and should come with a Full, Modified, and Improved cylinder.