+1-800-504-5897 Live Chat Help Center Check Order Status
About Us Policies Reviews How To
Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

ERGO KeyMod Forward Rail 4237

FII 4237 ERGO KEYMOD FORWARD RAIL
FII 4237 ERGO KEYMOD FORWARD RAIL
FII 4237 ERGO KEYMOD FORWARD RAIL
1 of 2 images
FII 4237 ERGO KEYMOD FORWARD RAIL
FII 4237 ERGO KEYMOD FORWARD RAIL
2 of 2 images
FII 4237 ERGO KEYMOD FORWARD RAIL

Tap Tap to Zoom

Questions & Answers
how long is the forward rail? Expert Answer

Ergo does not provide the length of their KeyMod Forward Rails. I would recommend reaching out to them directly for more information.

by Ethan, Gear Expert, October 20, 2022
View All Q&A You Have a Question? Ask!

Product Discontinued by Manufacturer

ERGO KeyMod Forward Rail has been discontinued by ERGO and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Weapon Accessories, Gun Parts, Picatinny Rail Sections yourself to try and find the perfect replacement for you!

Product Info for ERGO KeyMod Forward Rail

This Forward Rail is a KeyMod Quad System that bolts to and extends forward of an A2 front sight. No modification to the rifle is necessary and can be used with existing plastic handguards in place.image

Features of FII 4237 ERGO KEYMOD FORWARD RAIL:

  • Aluminum; Carbine Style AR

Package Contents:

  • ERGO KeyMod Forward Rail

Firearm Case

1–30 / 30
Previous
Best Rated
MTM Tactical 39in Rifle Crate, Dark Earth, TRC39
MTM Tactical 39in Rifle Crate, Dark Earth, TRC39
(9)
List: $134.99
$134.79
12% Coupon
Evolution Outdoor President Series Case
Evolution Outdoor President Series Case
(1)
As Low As (Save Up to 11%)
$57.99
See all 2 models
Final Sale
Ulfhednar Gun Case/Shooting Mat Combo, Cordura Material, UH041
Ulfhednar Gun Case/Shooting Mat Combo, Cordura Material, UH041
(1)
List: $598.00 (Save 15%)
$509.99
Best Rated
Pelican VAULT V800 Double Rifle Case, 56.11in
Pelican VAULT V800 Double Rifle Case, 56.11in
(35)
List: $279.72 (Save 18%)
$229.95
See all 2 models
Best Rated
Pelican 1770 Long Watertight Case w/Foam and Lid, Black, 017700-0000-110
Pelican 1770 Long Watertight Case w/Foam and Lid, Black, 017700-0000-110
(13)
List: $894.95 (Save 19%)
$724.95
Best Rated
Pelican Storm Cases iM3200 Long Rifle Case
Pelican Storm Cases iM3200 Long Rifle Case
(17)
As Low As (Save Up to 21%)
$329.99
See all 3 models
Ulfhednar Gun Case w/backpack straps 140 cm, NSN N, UH040
Ulfhednar Gun Case w/backpack straps 140 cm, NSN N, UH040
(3)
List: $508.00 (Save 20%)
$406.40
Eberlestock E2B Sniper Sled Drag Bag - 57in Long, Black
Eberlestock E2B Sniper Sled Drag Bag - 57in Long, Black
$399.00
See all 3 models
Best Rated
Pelican VAULT V700 Case, Takedown Firearms, 39.61in, Black, VCV700-0000-BLK
Pelican VAULT V700 Case, Takedown Firearms, 39.61in, Black, VCV700-0000-BLK
(12)
List: $210.99 (Save 19%)
$169.95
Best Rated
Pelican Vault V730 Tactical Rifle Case wl/wf, 47.1in
Pelican Vault V730 Tactical Rifle Case wl/wf, 47.1in
(19)
List: $257.00 (Save Up to 19%)
$209.95
See all 2 models
On Sale
Boyt Harness Deluxe Plantation Series Rifle Case, Taupe, 48in, 25135
Boyt Harness Deluxe Plantation Series Rifle Case, Taupe, 48in, 25135
(9)
List: $155.00 (Save 20%)
$123.79
Ulfhednar Gun Case w/Backpack Straps
Ulfhednar Gun Case w/Backpack Straps
(4)
As Low As (Save Up to 13%)
$369.99
See all 2 models
Boyt Harness H48SG Single Long Gun Case, 48in, Black, 40139
Boyt Harness H48SG Single Long Gun Case, 48in, Black, 40139
(7)
List: $165.00 (Save 20%)
$132.49
Best Rated
Pelican Storm Cases iM3100 Long Hard Gun Case, 39.8in
Pelican Storm Cases iM3100 Long Hard Gun Case, 39.8in
(18)
As Low As (Save Up to 14%)
$304.95
See all 3 models
Blazin' Deal
Galati Gear 35in. Riot Gun Case 105819
Galati Gear 35in. Riot Gun Case 105819
(1)
List: $98.95 (Save 26%)
$72.86
Best Rated
Eberlestock Sniper Sled Drag Bag Gun Case
Eberlestock Sniper Sled Drag Bag Gun Case
(12)
List: $380.00 (Save Up to $11.00)
$369.00
See all 5 models
Boyt Harness H36SG Single Takedown/Tactical Black, Interior 36.5in. x 13.5in. x 4in., 42104, Black, 42104
Boyt Harness H36SG Single Takedown/Tactical Black, Interior 36.5in. x 13.5in. x 4in., 42104, Black, 42104
(6)
List: $162.00 (Save 14%)
$139.79
Best Rated
Pelican Storm Cases iM3300 Long Hard Gun Case, 53.8in
Pelican Storm Cases iM3300 Long Hard Gun Case, 53.8in
(36)
As Low As (Save Up to 19%)
$329.95
See all 3 models
On Sale
Boyt Harness Double Gun Case, OD Green, 52in, 0GC21DG09
Boyt Harness Double Gun Case, OD Green, 52in, 0GC21DG09
(2)
List: $150.00 (Save 24%)
$113.79
5% Bonus Bucks
Armageddon Gear Precision Rifle Case
Armageddon Gear Precision Rifle Case
(12)
As Low As (Save Up to $4.36)
$261.01
See all 9 models
Best Rated
Eylar Extra Large 53in Waterproof Roller Hard Rifle Case w/Foam
Eylar Extra Large 53in Waterproof Roller Hard Rifle Case w/Foam
(10)
As Low As (Save Up to 48%)
$209.99
See all 6 models
Armageddon Gear M2010 Precision Rifle Case, Coyote Brown, AG0111
Armageddon Gear M2010 Precision Rifle Case, Coyote Brown, AG0111
(2)
List: $389.99 (Save $8.82)
$381.17
On Sale
Browning Lona Flex Soft Gun Case
Browning Lona Flex Soft Gun Case
(14)
As Low As (Save Up to 36%)
$96.59
See all 4 models
Flambeau 513SN Double Coverage Black Polymer 5 Scoped Rifle Or Shotgun
Flambeau 513SN Double Coverage Black Polymer 5 Scoped Rifle Or Shotgun
List: $131.99 (Save $4.00)
$127.99
Magpul DAKA Hard Gun Case LR53
Magpul DAKA Hard Gun Case LR53
As Low As (Save Up to $10.60)
$339.95
See all 2 models
Birchwood Casey Single 36in Gun Case, Black, 600D Polyester, Rifle, BC-RBG36
Birchwood Casey Single 36in Gun Case, Black, 600D Polyester, Rifle, BC-RBG36
List: $104.99 (Save $9.00)
$95.99
On Sale
Boyt Harness Rifle Case
Boyt Harness Rifle Case
(3)
As Low As (Save Up to 44%)
$121.99
See all 2 models
Plano Special Edition SE Rimfire/Sporting Case, 41.8In, Black, PMC1014212
Plano Special Edition SE Rimfire/Sporting Case, 41.8In, Black, PMC1014212
(5)
List: $49.99 (Save 40%)
$29.89
Plano Rustrictor AW2 Rifle Case
Plano Rustrictor AW2 Rifle Case
(1)
As Low As (Save Up to $20.00)
$168.99
See all 2 models
Pelican V800, Vault Double Rifle Case, With Foam, Olive Drab Green, 56.11"x 19.15"x 6.65" VCV800-0000-ODG
Pelican V800, Vault Double Rifle Case, With Foam, Olive Drab Green, 56.11"x 19.15"x 6.65" VCV800-0000-ODG
List: $255.99 (Save 10%)
$229.95
Next

Related Products to ERGO KeyMod Forward Rail

Image of ERGO Suregrip AR15/M16 Right Hand Grip ERGO Suregrip AR15/M16 Right Hand Grip (1) List: $17.25 (Save $1.21) $16.04 Blazin' Deal
Image of ERGO Tactical Deluxe Grip Plug 2 models ERGO Tactical Deluxe Grip Plug (3) List: $6.99 $6.50 Blazin' Deal
Image of ERGO AR-15 SuperGrip Tactical Delux Grip w/ Palm Shelf ERGO AR-15 SuperGrip Tactical Delux Grip w/ Palm Shelf List: $44.50 (Save $3.11) $41.39 Blazin' Deal
Image of Ergo 2 AR15/AR10 Ambidextrous SureGrips Kits 9 models Ergo 2 AR15/AR10 Ambidextrous SureGrips Kits (40) As Low As (Save Up to 35%) $23.99 Blazin' Deal
Image of Ergo A2 Grip Plugs Ergo A2 Grip Plugs (5) List: $5.99 $5.57 Blazin' Deal
Image of Ergo Grip M-LOK Hand Stop/Barricade Stops Ergo Grip M-LOK Hand Stop/Barricade Stops (8) List: $45.99 (Save 12%) $40.63 Blazin' Deal
Image of ERGO AR-15 Original SuperGrip Grip 2 models ERGO AR-15 Original SuperGrip Grip (50) As Low As (Save Up to 41%) $22.66 Blazin' Deal
Image of ERGO 5-Slot Low Pro Wire Loom Rail Covers 3 models ERGO 5-Slot Low Pro Wire Loom Rail Covers (6) As Low As (Save Up to 51%) $6.79 Blazin' Deal
Image of Ergo Grip AR15/M16 Flat Top Tactical Deluxe SureGrips 2 models Ergo Grip AR15/M16 Flat Top Tactical Deluxe SureGrips (15) As Low As (Save Up to 21%) $39.05 Blazin' Deal
Image of ERGO Modular Wedgelok Rail Covers 10 models ERGO Modular Wedgelok Rail Covers (31) As Low As (Save Up to 47%) $15.10 Blazin' Deal
Image of Ergo Original Grip - Supergrip 3 models Ergo Original Grip - Supergrip (7) As Low As (Save Up to 24%) $22.66 Blazin' Deal
Image of Ergo AR15/M16/M4 Never Quit Magwell Grips 9 models Ergo AR15/M16/M4 Never Quit Magwell Grips (22) As Low As (Save Up to 48%) $10.70 Blazin' Deal
Image of Ergo Grip Slide Mounts 2 models Ergo Grip Slide Mounts (2) As Low As (Save Up to $1.24) $15.49 Blazin' Deal
Image of Ergo Enhanced Machined Aluminum Trigger Guards Ergo Enhanced Machined Aluminum Trigger Guards (2) List: $13.50 $13.49
Image of Ergo Tactical Deluxe Flat Top Grips w/Palm Shelf SureGrips Ergo Tactical Deluxe Flat Top Grips w/Palm Shelf SureGrips (8) List: $53.75 (Save 12%) $47.49 Blazin' Deal
Image of ERGO 7-Slot KeyMod Wedgelok Rail Cover 11 models ERGO 7-Slot KeyMod Wedgelok Rail Cover (8) As Low As $11.39 Blazin' Deal
Image of ERGO Suregrip AR15/M16 Grip ERGO Suregrip AR15/M16 Grip (1) List: $27.51 (Save 44%) $15.49
Image of Ergo Grip ERGO Keymod Hand Stop/Barricade Stops Ergo Grip ERGO Keymod Hand Stop/Barricade Stops (3) List: $35.50 (Save $2.48) $33.02
Image of Ergo Grip AR15/M16 Gappers Ergo Grip AR15/M16 Gappers (3) List: $9.24 (Save 57%) $3.99
Image of Ergo Surestop Tactical Hand Stops Ergo Surestop Tactical Hand Stops (10) List: $35.99 (Save 28%) $25.99
Image of ERGO SureGrip 2 Flat Top AR15/AR10 Grips Kit 7 models ERGO SureGrip 2 Flat Top AR15/AR10 Grips Kit (3) As Low As (Save Up to 33%) $19.49 Blazin' Deal
Image of Ergo Grip .750 Low Profile Gas Blocks Ergo Grip .750 Low Profile Gas Blocks (5) List: $20.50 $20.49 Best Rated
Image of Ergo Grip M-LOK Angled Grips Ergo Grip M-LOK Angled Grips (3) List: $41.99 (Save $2.94) $39.05
Image of Ergo Grip FN Scar SureGrips Ergo Grip FN Scar SureGrips (13) List: $39.99 (Save 14%) $34.54 Blazin' Deal

ERGO KeyMod Forward Rail Unavailable & Discontinued Models

List of Unorderable Models

  • ERGO KeyMod Forward Rail, Black, 4237 , MPN: 4237 , UPC: 874748006088 , Code: 3E-T8-4237-4237
Compare (0)
1 item has been added
Add at least two items to compare
Last updated 2026-08-23 UTC.