Current AR-15 style pistol, rifle, and accessories manufacturer, located in Lexington Park, MD.
F4 Defense manufactures the patent pending Adaptive Rail System (ARS or ARS-L, light configuration) for their line of firearms.
F4 DEFENSE Models
.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. gas block, ELF drop-in match (disc. 2021) or TriggerTech AR Primary (new 2022) trigger, MFT Utility Battle (disc. 2021) or Magpul MOE (new 2022) stock, 15.8 in. F4 ARS Lite handguard, MFT grip, BAD short-throw ambi safety selector, F4 billet receivers, ambi bolt catch and mag. release, F4 QR charging handle, F4 Defense black Nitride BCG, Type III Class 2 hardcoat anodized black or Cerakote finish, 7.95 lbs.
.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-throw ambi safety selector, ambi bolt catch and mag. release, 15.8 in. ARS-L handguard, billet aluminum receivers, F4 QR charging handle, F4 NiB BCG, Type III Class 2 hardcoat anodized black or Cerakote finish, 7.15 lbs.
.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. 2021) or Magpul MOE (new 2022) stock, BAD short-throw ambi safety selector, F4 billet aluminum receivers, ambi bolt catch and mag. release, 13.6 in. F4 ARS-L handguard, F4 QR ambi charging handle, F4 Defense NIB BCG, Type III Class 2 hardcoat anodized black or Cerakote finish, 6.74 lbs.
.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 shot Lancer L7 AWM mags., single stage ELF match or two-stage TriggerTech adaptable AR Primary trigger, XLR Industries TAC-Lite Precision, Magpul MOE SL, MFT Battlelink Utility (disc.), or fully adj. MFT Minimalist (disc.) stock, 15.8 in. F4 Defense ARS, ARS-L, or ARS-L flat front handguard, MFT grip, BAD short-throw ambi selector, billet receivers, Radian Raptor ambi charging handle, Type III Class 2 hardcoat anodized black or Cerakote finish, approx. 6.5-7.5 lbs. Disc. 2020.
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-stage TriggerTech adaptable AR Primary trigger, fully adj. XLR Industries TAC-Lite Precision or MFT Minimalist stock, pistol grip, BAD short-throw ambi selector, Superlative Arms adj. gas block, gas system varies by caliber, aluminum billet receivers, 15.8 in. ARS-L handguard, Type III Class 2 hardcoat anodized black or Cerakote finish, 7.74 lbs. Disc. 2020.
.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 available (6.5 Creedmoor only), Seekins Precision ATC muzzle brake, Superlative Arms low profile adj. gas block, two Lancer L7 AWM mags., TriggerTech two-stage Adaptable AR Primary Trigger, F4 carbon fiber stock, cheek riser, and handguard, skeletonized grip, Radian Talon short throw ambi selector, billet aluminum receivers, Radian Raptor ambi charging handle, hydraulic buffer system, Type III Class 2 hardcoat anodized black or Cerakote finish, 5.85 lbs. New circa 2020.
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, or standard profile Bartlein match grade stainless steel barrel, Superlative Arms low profile adj. gas block, Seekins ATC brake, two Lancer L7 AWM mags., TriggerTech two-stage Adaptable AR Primary Trigger, fully adj. XLR Industries TAC-Lite Precision or Magpul MOE SL stock, 15.5 in. F4 Defense ARS, ARS-L, or ARS-L flat front handguard, MFT grip, Radian Talon short throw ambi safety selector, billet aluminum receivers, Type III Class 2 hardcoat anodized black or Cerakote finish, 6.85-7 lbs.
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 grips, Radian Talon short throw ambi selector, billet receivers, Radian Raptor ambi charging handle, black anodized finish, 7.15 lbs. New 2021.
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 pistol brace, F4 Defense 5.5, 6.5, 8.3, or 9 in. ARS w/Picatinny and M-LOK mounting, MFT grip, Radian Talon ambi short throw selector, ambi bolt catch and mag. release, Type III Class 2 anodized black finish, 5.79 lbs.
.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 Trigger or ELF drop-in match trigger, SB Tactical SBA3 pistol brace, M-LOK handguard, MFT grip, F4 Defense billet machined aluminum receivers w/integral QD sling sockets, Radian Talon ambi short throw selector, Type III Class II black anodized finish, 6.7 lbs. Disc. 2021.