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SI Defense .308 Stainless Steel Barrel Extension
SI Defense .308 Stainless Steel Barrel Extension
Our Price: $75.00

SI Defense .308 Stainless Steel Barrel Extension is made from 416 stainless steel. ©DPMS compatible.
SI Defense .308 M4 Barrel, Chrome-Moly, 16
SI Defense .308 M4 Barrel, Chrome-Moly or Stainless Steel, 14.5"
List Price: $250.00
Our Price: $250.00
Sale Price: $199.00
You Save $51.00

Qty: 3 chrome-moly barrels in stock


.308 caliber, lightweight M4 contoured barrel, 14.5" length, .750 gas block diameter. 4140 chrome-moly barrel weighing in at 2 pounds, 3.4 oz. Button rifled with a 1/10 twist. Includes installed barrel extension. Use with carbine-length gas tubes. Threaded with 5/8 x 24 for use with a compensator or flash suppressor. Compatible with DPMS .308 AR rifles. When YHM Phantom compensator/suppressor is pinned or welded, finish barrel length is 16" long, not including barrel extension length. Overall length, including extension is 15.75". Heavy manganese phosphate finish.

Optional coating on barrel with graphite black Cerakote, add $125.

416 Stainless steel barrel, add $75
SI Defense .308 M4 Barrel, Chrome-Moly or Stainless Steel, 16
SI Defense .308 M4 Barrel, Chrome-Moly or Stainless Steel, 16"
List Price: $250.00
Our Price: $250.00
Sale Price: $199.00
You Save $51.00

.308 caliber, lightweight M4 contoured barrel, .750 gas block diameter. 4140 chrome-moly steel barrel weighing in at 2 pounds, 6.4 oz. Button rifled with a 1/10 twist. Includes installed barrel extension. Use with carbine-length gas tubes. Threaded with 5/8 x 24 for use with a compensator or flash suppressor. Compatible with DPMS .308 AR rifles. Heavy manganese phosphate finish.

Optional coating on barrel with graphite black Cerakote, add $125.

416 Stainless steel barrel, add $75
SI Defense .243 Winchester Barrel, Chrome-Moly, 18
SI Defense .243 Winchester Barrel, Chrome-Moly, 18"
Our Price: $250.00

Great caliber for flat shooting, antelope, deer and varmints! .243 Winchester caliber, 18" length, .750 gas block diameter. 4140 chrome-moly steel barrel weighing in at 3 pounds, 2.4 oz. Button rifled with a 1/10 twist. Includes installed barrel extension. Use with rifle-length gas tubes. Threaded with 5/8 x 24 for use with a compensator or flash suppressor. Compatible with DPMS .308 AR rifles. Heavy manganese phosphate finish.

Optional coating on barrel with graphite black Cerakote, add $125.

416 Stainless steel barrel, add $75.
SI Defense .338 Federal Barrel, Chrome-Moly, 18
SI Defense .338 Federal Barrel, Chrome-Moly, 18"
Our Price: $250.00

Great caliber for better knockdown. The .338 Federal is a necked up .308 cartridge and is great for hunting black bear, deer and elk. 338 Federal caliber, 18" length, .750 gas block diameter. 4140 chrome-moly steel barrel weighing in at 3 pounds, 2.4 oz. Button rifled with a 1/10 twist. Includes installed barrel extension. Use with rifle-length gas tubes. Threaded with 5/8 x 24 for use with a compensator or flash suppressor. Compatible with DPMS .308 AR rifles. Heavy manganese phosphate finish.

Optional coating on barrel with graphite black Cerakote, add $125.

416 Stainless steel barrel, add $75.
SI Defense .257 Roberts Barrel, Chrome-Moly, 18
SI Defense .257 Roberts Barrel, Chrome-Moly, 18"
Our Price: $250.00

"The Bob" Great deer and varmint shooting caliber. .257 Roberts caliber, 18" length, .750 gas block diameter. 4140 chrome-moly steel barrel weighing in at 3 pounds, 2.4 oz. Button rifled with a 1/10 twist. Includes installed barrel extension. Use with rifle-length gas tubes. Threaded with 5/8 x 24 for use with a compensator or flash suppressor. Compatible with DPMS .308 AR rifles. Heavy manganese phosphate finish.

Optional coating on barrel with graphite black Cerakote, add $125.

416 Stainless steel barrel, add $75.