Pursue Your Passion
My Cart

Rainier Arms on Instagram

Menu
Account

Fortis Manufacturing (Fortis MFG)

Strenght by design

Fortis Manufacturing goal is to provide “Operator” needed strength with exceptional design and aesthetics at an affordable price. Passionate about bringing the best AR15/M16 products to market. Fortis Manufacturing, Inc. (FMI), utilizes only the highest quality materials available and machining that is second to none. Every product designed by FMI™ undergoes a strenuous testing and evaluation period with a diverse group of select professionals. It is this philosophy that ensures each product will meet or exceed the heavy demands of the professionals who use them.

raineirarms
View as Grid List

Items 33-48 of 66

Page
per page
View as Grid List

Items 33-48 of 66

Page
per page
Shop By
Now Shopping by
  1. Manufacturer Fortis MFG Remove This Item
Clear All
Shopping Options
Barrel Length
  1. 10.3" 1 item
Caliber
  1. 300 Blackout 1 item
  2. 5.56 NATO 2 items
  3. 5.56mm 2 items
  4. 7.62mm 1 item
  5. 9mm 4 items
Color
Configuration
  1. AR-15 1 item
  2. Left Hand 1 item
  3. Right Hand 1 item
Finish
  1. Bead Blast Stainless Steel 1 item
  2. Case Hardened 1 item
  3. Nitride 2 items
  4. Phosphate 1 item
  5. Anodize 14 items
Gas Block Diameter
  1. .750" 1 item
Height
  1. Absolute Co-Witness 1 item
  2. Lower 1/3 Co-Witness 1 item
Inside Diameter
  1. 1.34" 4 items
Model
  1. Glock 19 2 items
  2. Sig MCX 1 item
Mount
  1. M-LOK 10 items
  2. Picatinny 1 item
Optic Footprint
  1. Aimpoint Micro 1 item
Option
  1. AR-10 2 items
  2. AR-15 17 items
  3. 9mm 1 item
  4. Glock 2 items
  5. Non-Adjustable 2 items
Platform
  1. AR-10/LR308 2 items
  2. AR-15 2 items
  3. Glock 2 items
  4. Sig Sauer 1 item
Price
  1. $0.00 - $99.99 41 items
  2. $100.00 - $199.99 13 items
  3. $200.00 - $299.99 9 items
  4. $300.00 and above 3 items
Product Type
  1. Angled Grip 2 items
  2. AR-10 / LR 308 Charging Handle 1 item
  3. AR-10 Handguard 1 item
  4. AR-15 Charging Handle 3 items
  5. AR-15 Handguard 8 items
  6. AR-15 Receiver Set 1 item
  7. AR-15 Stripped Lower Receiver 2 items
  8. AR-15 Stripped Upper Receiver 1 item
  9. Blast Shield 1 item
  10. Bolt Carrier Group 1 item
  11. Castle Nut / End Plate 2 items
  12. Charging Handle 2 items
  13. Dust Cover 2 items
  14. End Plate 1 item
  15. Gas Block 2 items
  16. Gunsmithing Tool 1 item
  17. Handgun Barrel 2 items
  18. Handstop 2 items
  19. Lower Parts Kit 1 item
  20. Magazine Button 1 item
  21. Magazine Catch 1 item
  22. Magazine Release 1 item
  23. Muzzle Brake 7 items
  24. Muzzle Device Accessory 2 items
  25. Parts Kit 1 item
  26. Pistol Grip 8 items
  27. Red Dot Mount 1 item
  28. Safety Selector 2 items
  29. Sling Mount 2 items
  30. Stock 2 items
  31. Take Down / Pivot Pins 1 item
  32. Vertical Grip 2 items
Rail Length
  1. 6.7" 5 items
  2. 9.6" 7 items
  3. 11.8" 3 items
  4. 12" 1 item
  5. 12.4" 3 items
  6. 13" 1 item
  7. 13.8" 6 items
  8. 15" 1 item
  9. 15.3" 6 items
  10. 17" 1 item
Thread Pitch
  1. 1/2x28 (9mm) 2 items
  2. 1/2x28 (.22 cal) 3 items
  3. 1/2x36 2 items
  4. 5/8x24 (.30 cal) 1 item
Threaded
  1. Yes 2 items
  2. No 1 item
Twist Rate
  1. 1:10 2 items
Stock Status
  1. In stock 52 items
  2. Out of stock 14 items
My Wish List
Last Added Items
  1. Add to Cart
    Remove This Item
Go to Wish List
You have no items in your wish list.
Google Customer Reviews Google Customer Reviews