Build it to the drawing.
F1 Firearms US is a parts-first AR store: F-1 Firearms receiver sets, handguards, DuraBolt bolt carrier groups, barrels and muzzle devices, plus binary and forced reset triggers. Serialized items ship to your FFL.
on the sheet
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to your dealer
checkout
The parts index
F1 Firearms Rifles and Pistols
F1 Firearms Handguards
F1 Firearms Receiver Sets
F1 Firearms Muzzle Devices
F1 Firearms Barrels
F1 Firearms Parts and Accessories
Binary Triggers
F1 Firearms Bolt Carrier Groups
Pulled from every drawer
F-1 Firearms Dragon Slay AR 308 Muzzle Brake
F-1 Firearms Flat Faced Compensating Muzzle Brake (5.56/.223)
F1 Firearms 5.56mm NATO DuraBolt Bolt Carrier Group – Black PVD
F1 Firearms 5.56mm NATO DuraBolt Bolt Carrier Group – Blue PVD
F1 Firearms C7K Handguard 9.75 Inch
F1 Firearms M7M – Miculek 15″ Handguard AR-15 Aluminum
Fostech Echo AR-II Binary Trigger
Fostech Echo Sport Binary Trigger
Three checks before you order
The barrel nut
Some F-1 handguard series mount on the maker's own barrel nut, not a mil-spec one. The listing tells you which nut the rail needs.
The platform
AR-15 and AR-10 parts do not swap. Match the receiver set, rail and bolt carrier group to your platform and caliber.
What is serialized
Lowers, receiver sets and complete firearms go to the FFL dealer you choose. Everything else ships to your door where the law allows.
Find any firearm, part & accessory
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F-1 Firearms parts for the AR you are building
F1 Firearms US is a small, parts-first store for AR-15 and AR-10 builders. The shelves are built around one maker, F-1 Firearms, whose skeletonized billet receivers and light handguards are some of the easiest parts in the AR world to recognise. We are an independent retailer and not the manufacturer, which means the descriptions here are written for the person bolting the part on, not for a catalogue.
Start with the part you need
- Receiver sets: BDR-15-3G, UDR-15-3G and the forged FDR-15, sold as matched upper and lower pairs.
- Handguards: the C7M and X7M contoured rails and the S7M, P7M and H7M weight-saving profiles, all M-LOK.
- Bolt carrier groups: DuraBolt carriers in 5.56 NATO, 7.62 NATO and 9mm, in black DLC or gold TiN.
- Barrels and muzzle devices: .223 Wylde stainless barrels and the brand's compensating brakes.
- Complete rifles and pistols for shooters who would rather buy than build.
- Triggers: binary and forced reset triggers from Fostech, Franklin Armory and Rare Breed.
Three things to check before you order
The barrel nut. Several F-1 handguard series use the maker's own barrel nut instead of a standard mil-spec one. If you are swapping a rail onto an upper you already own, read the listing for the nut it needs and add the matching wrench if you do not have one.
The platform. AR-15 and AR-10 parts do not interchange. Receiver sets, handguards and bolt carrier groups are listed by platform and caliber, and a 7.62 DuraBolt will not run in a 5.56 rifle. Match the part to the rifle, not to the picture.
What is serialized. A lower receiver, a matched receiver set and a complete firearm are firearms under federal law. They ship to a Federal Firearms Licensee that you choose, and you fill in ATF Form 4473 and pass the background check there. Handguards, bolt carrier groups, barrels, muzzle devices, grips and small parts ship to your address where state and local law allow it.
More than this store lists
The search bar reaches well past the products on these pages. Type a maker or model and you will get matching firearms, optics and ammunition from our wider catalog, with the same checkout and the same transfer process.
State and local rules on features, magazine capacity and trigger types differ. You are responsible for knowing what is legal where you live before you order.