F4 DEFENSE

F4 Defense manufactures the patent pending Adaptive Rail System (ARS or ARS-L, light configuration) for their line of firearms.
Current AR-15 style pistol, rifle, and accessories manufacturer, located in Lexington Park, MD.
F4 DEFENSE logo

F4 DEFENSE Firearms Models

F4 NIGHTHAWK (ULTRALITE SMALL FRAME AR10) Image

F4 NIGHTHAWK (ULTRALITE SMALL FRAME AR10)

.308 Win., 6.5 Creedmoor, 6mm Creedmoor, 6.5×47 Lapua, .22 Creedmoor, .243 Win., .260 Rem., or 7mm-08 Rem. cal., GIO, Bartlein match grade SS Lightweight, SPR, or standard profile barrel in various lengths, 22 in. carbon fiber barrel option...

PERSONAL DEFENSE WEAPON Image

PERSONAL DEFENSE WEAPON

5.56 NATO or .300 AAC Blackout cal., GIO, pistol length gas system, 7.5 or 8 (.300 AAC Blackout only) in. SS barrel, F4 Linear Comp muzzle device, low profile gas block, TriggerTech two-stage Competitive AR Primary Trigger, SB Tactical SBA3...

SF10 SMALL FRAME PDW 308 Image

SF10 SMALL FRAME PDW 308

.308 Win. cal., GIO, Carbine+1 gas system, 12.5 in. 10T Shilen match grade SS barrel, F4 Linear Comp muzzle device, low profile Superlative Arms adj. gas block, two 20 shot Lancer L7 AWM mags., TriggerTech two-stage Competitive AR Primary T...

F4-15 6MM ARC RIFLE Image

F4-15 6MM ARC RIFLE

6mm ARC cal., GIO, 18 in. 7.5T fluted match grade stainless steel barrel, Seekins Precision muzzle brake, Superlative Arms adj. gas system, TriggerTech adaptable two-stage AR Primary Trigger, MFT stock, 15.5 in. ARS M-LOK handguard, MFT gri...

F4-15 DMR (DESIGNATED MARKSMAN RIFLE) Image

F4-15 DMR (DESIGNATED MARKSMAN RIFLE)

.223 Wylde chamber, GIO, adj. mid-length gas system, 18 in. stainless steel match grade barrel w/3-land polygonal rifling, F4 QR muzzle brake, ELF drop-in match trigger, MFT Minimalist (disc. 2021) or Magpul MOE (new 2022) stock, BAD short-...

F4-15 HUNTER (F4-15 EBR) Image

F4-15 HUNTER (F4-15 EBR)

.204 Ruger, .22 Nosler (disc. 2021), .224 Valkyrie (disc. 2021), 6mm ARC (new 2022), or 6.5 Grendel cal., GIO, 18 (6.5 Grendel) or 20 in. stainless steel match grade barrel, F4 Linear Comp muzzle device, low profile Superlative Arms adj. ga...

F4-15 RECON "RECCE" RIFLE Image

F4-15 RECON "RECCE" RIFLE

.223 Wylde chamber, adj. mid-length gas system, 16 in. stainless steel match grade barrel w/3-land polygonal rifling, F4 QR muzzle brake, ELF SE drop-in match (disc. 2021) or TriggerTech Competitive AR Primary Trigger, MFT minimalist (disc....

SF-10 CARBON FIBER Image

SF-10 CARBON FIBER

.308 Win. or 6.5 Creedmoor (disc.) cal., GIO, Intermediate or +2 CAMGAS gas system, 16, 18, or 22 in. Proof Research carbon fiber barrel, Superlative Arms adj. low profile gas block, APA Little Bastard or Seekins Precision ATC brake, two 20...

SF-10 SMALL FRAME Image

SF-10 SMALL FRAME

6.5 Creedmoor, 6mm Creedmoor, .22 Creedmoor (disc. 2021), .243 Win., .260 Rem. (disc. 2021), 7mm-08 Rem. (disc. 2021), .308 Win., or .338 Federal cal. GIO, various gas system lenghts, 16 (.308 Win. only), 18, 20, or 22 in. Lightweight, SPR,...

SF-10 STAINLESS STEEL Image

SF-10 STAINLESS STEEL

6.5 Creedmoor, 6mm Creedmoor, .22 Creedmoor, .243 Win., .260 Rem., 7mm-08, or .308 Win. cal., small frame AR10, 18 in. match grade stainless steel fluted barrel, Seekins Precision ATC brake, Lancer L7 AWM, single stage ELF match or two-stag...