Century Arms C308 Sporter .308 Win Semi-Auto Rifle, 18 in Barrel, Roller-Delayed Blowback, Welded MIL-STD-1913 Top Rail, Black Polymer Furniture
The Century Arms C308 Sporter is a U.S.-made, HK/CETME-pattern .308 Win semi-auto with a roller-delayed blowback action, an 18-inch 4140 chrome-moly steel barrel, and a welded MIL-STD-1913 top rail. It comes with black polymer furniture, a hooded front sight with the welded top rail ready for optics or a rear sight, and a 5/8x24 RH threaded muzzle with a multi-port brake installed. This example is in excellent condition with a clean, sharp bore and includes two 20-round magazines and one 5-round magazine.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This rifle shows minimal evidence of prior use. The bore is clean and shiny.
What's Included
- No case included
- Two 20-round G3-pattern metal magazines
- One 5-round G3-pattern metal magazine
This C308 Sporter follows the proven HK/CETME pattern with a roller-delayed blowback system and a stamped sheet steel receiver. It uses G3/CETME-pattern detachable box magazines and features a two-position SEF-style selector with S (white) and F (red) markings.
The 18-inch barrel is made from 4140 chrome-moly steel and is threaded 5/8x24 RH. A multi-port muzzle brake is installed at the factory. The bore shows excellent rifling with sharp lands and grooves.
A welded MIL-STD-1913 top rail is integral to the receiver for secure mounting. The rifle retains a hooded front post; rear sighting solutions or optics can be mounted to the rail as desired. The rifle is finished in black.
Ergonomics are straightforward with durable black polymer furniture, including a fixed stock with a rubber buttpad, a slim ventilated handguard, and a polymer pistol grip. Length of pull is 15 inches, and the rifle incorporates a manual safety.

