+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

Remington Model 870 Magazine Extension Kit

Remington Model 870 18in Magazine Extension Kit Adds 2 Extra shots Blued Stainless Steel, Parkarized 19420, EDEMO1
Remington Model 870 20in Magazine Extension Kit Adds 3 Extra shots Blued 19421, EDEMO1
Remington Model 870 20in Magazine Extension Kit Adds 3 Extra shots Parkarized 19422, EDEMO1
Remington Model 870 18in Magazine Extension Kit Adds 2 Extra shots Blued Stainless Steel, Blued 19419
Remington Model 870 18in Magazine Extension Kit Adds 2 Extra shots Blued Stainless Steel, Parkarized 19420, EDEMO1
Remington Model 870 20in Magazine Extension Kit Adds 3 Extra shots Blued 19421, EDEMO1
Remington Model 870 20in Magazine Extension Kit Adds 3 Extra shots Parkarized 19422, EDEMO1
Remington Model 870 18in Magazine Extension Kit Adds 2 Extra shots Blued Stainless Steel, Blued 19419
Remington Model 870 18in Magazine Extension Kit Adds 2 Extra shots Blued Stainless Steel, Parkarized 19420, EDEMO1
1 of 8 images
Remington Model 870 18in Magazine Extension Kit Adds 2 Extra shots Blued Stainless Steel, Parkarized 19420, EDEMO1
Remington Model 870 20in Magazine Extension Kit Adds 3 Extra shots Blued 19421, EDEMO1
2 of 8 images
Remington Model 870 20in Magazine Extension Kit Adds 3 Extra shots Blued 19421, EDEMO1
Remington Model 870 20in Magazine Extension Kit Adds 3 Extra shots Parkarized 19422, EDEMO1
3 of 8 images
Remington Model 870 20in Magazine Extension Kit Adds 3 Extra shots Parkarized 19422, EDEMO1
Remington Model 870 18in Magazine Extension Kit Adds 2 Extra shots Blued Stainless Steel, Blued 19419
4 of 8 images
Remington Model 870 18in Magazine Extension Kit Adds 2 Extra shots Blued Stainless Steel, Blued 19419
Remington Model 870 18in Magazine Extension Kit Adds 2 Extra shots Blued Stainless Steel, Parkarized 19420, EDEMO1
5 of 8 images
Remington Model 870 18in Magazine Extension Kit Adds 2 Extra shots Blued Stainless Steel, Parkarized 19420, EDEMO1
Remington Model 870 20in Magazine Extension Kit Adds 3 Extra shots Blued 19421, EDEMO1
6 of 8 images
Remington Model 870 20in Magazine Extension Kit Adds 3 Extra shots Blued 19421, EDEMO1
Remington Model 870 20in Magazine Extension Kit Adds 3 Extra shots Parkarized 19422, EDEMO1
7 of 8 images
Remington Model 870 20in Magazine Extension Kit Adds 3 Extra shots Parkarized 19422, EDEMO1
Remington Model 870 18in Magazine Extension Kit Adds 2 Extra shots Blued Stainless Steel, Blued 19419
8 of 8 images
Remington Model 870 18in Magazine Extension Kit Adds 2 Extra shots Blued Stainless Steel, Blued 19419

Tap Tap to Zoom

Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
Questions & Answers
This should say that it is for a 20" barrel, otherwise it won't be flush in an 18.5 or 18.0 barrel. Also, it is Parkerized, not Parkarized. Expert Answer

Thank you for bringing this to our attention and we apologize for any confusion that may have been caused. We have submitted a request to have the requested information added to our site and the typographical errors fixed.

by Tiffany S., Gear Expert, August 27, 2019
What gauge? It doesn't state. Expert Answer

Fits 18" 870, 1100, 11-87 12 Gauge Shotguns

by Coyte I., Gear Expert, June 27, 2018
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
Remington +3 magazine ext kit by JP, Verified Owner, March 30, 2017
Works great, easy install, nice finish make sure you tap on primary magazine tube to seat spring when installing Also, you might want to replace magazine foller with one such as S&J Hardware offers I know have a magazine capacity of 7 + 1in chambe...
Read More...
1/1 found this helpful
Helpful Positive Review
870 tube extension by bgjacks, October 21, 2020
the tube extension is pretty straight forward. With the exception of needing a drimmel tool to file down 2 bumps in the original tube to allow shells to slide into the extension. Assembly was easy and there are many you tube videos show how.
1/2 found this helpful
Helpful Positive Review
Home Defense Shotgun Build by Hawkeye, January 25, 2017
Great product, just what I needed for my Home Defense Shotgun Build, it's Remmington would expect anything different. This adds a few more rounds for the Bad Guys Arrived well packaged, and quicker than expected Thanks Optics Planet
2/3 found this helpful
Helpful Positive Review
870 Magazine Extension by Scott, Verified Owner, April 16, 2018
Nice piece, sticks out about 1/2" past the 20" barrels, but looks great. Loaded and tested, works nice. I have not taken to the range yet, but it cycled rounds nicely. It's hard to beat the factory Remington hardware!
6/7 found this helpful
Helpful Negative Review
Only holds 7 1/2 +1 not 8 by Adam West, Verified Owner, May 20, 2019
The little indent where the clamp goes is the main problem. It narrows down so far that my follower can not go past it and wastes about an inch of space inside the tube. It Will not hold 8 in the tube it will only hold 7 1/2 shells. I took this with ...
Read More...
4/12 found this helpful
Read All 5 Reviews
Color:
Blued
Fabric/Material:
Stainless Steel
Magazine Capacity:
2 Round
Additional Features:
18 in barrel
Condition:
New

Code: RT-MZX-R870ME-19419-2RD

MPN: 19419

UPC: 047700194196

Product No Longer Available

Product Info for Remington Model 870 Magazine Extension Kit

If you're looking around for an amazing bargain on the Remington Model 870 Magazine Extension Kit, then you have arrived at the right spot..image

These Shotgun Magazine Extensions through the expert product experts at Remington are designed using dependable and dependable resources, as a way to provide you with a product which is going to be powerful for quite some time. Manufactured using some of the most useful accessible materials and engineering, these unique Shotgun Magazine Extensions from the product professionals at Remington can last an unbelievably long time.

Remington has been generating high quality products for a number of years, and the Remington Model 870 Magazine Extension Kit is their very own means of revealing exactly how much they are concerned.

Here at OpticsPlanet, we make it our obligation to receive the perfect product for all of your specifications, and exhibiting the Remington Model 870 Magazine Extension Kit is a thing that we're delighted to offer.

Package Contents:

  • Remington Model 870 Magazine Extension Kit

Related Products to Remington Model 870 Magazine Extension Kit

Image of Remington 12GA Probore LT MD EXT Choke Tube Remington 12GA Probore LT MD EXT Choke Tube List: $43.99 (Save $2.00) $41.99
Image of Remington 12GA Probore I/C Choke Tube Remington 12GA Probore I/C Choke Tube List: $43.99 (Save $2.00) $41.99
Image of Remington RC Value Pack & Wrench Remington RC Value Pack & Wrench $65.99
Image of The Triggered Company Partisan Disruptor AR-15 Forced Reset Trigger 3 Position Drop In Forced Reset Rifle Trigger w/ Single Side Safety Selector 4 models The Triggered Company Partisan Disruptor AR-15 Forced Reset Trigger 3 Position Drop In Forced Reset Rifle Trigger w/ Single Side Safety Selector (453) As Low As (Save Up to $24.99) $275.00 13% Coupon
Image of The Triggered Company The Disruptor AR-15 Forced Reset Trigger 3 Position Drop In Forced Reset Rifle Trigger w/ Ambidextrous Safety Selector 2 models The Triggered Company The Disruptor AR-15 Forced Reset Trigger 3 Position Drop In Forced Reset Rifle Trigger w/ Ambidextrous Safety Selector (45) List: $324.99 (Save $25.00) $299.99 13% Coupon
Image of Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 .223 Rem/5.56x45mm NATO 30 Round Rifle Magazine 4 models Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 .223 Rem/5.56x45mm NATO 30 Round Rifle Magazine (61) As Low As (Save Up to 15%) $12.75 Best Rated
Image of Atrius Development Forced Reset Selector 7 models Atrius Development Forced Reset Selector (143) As Low As (Save Up to 16%) $184.99 Blazin' Deal
Image of Kaw Valley Precision Heavy H3 Stainless Steel Buffer Kaw Valley Precision Heavy H3 Stainless Steel Buffer (46) List: $49.95 (Save 20%) $39.95 Best Rated
Image of FAB Defense QD Weapon Sling Swivel FAB Defense QD Weapon Sling Swivel (48) List: $12.80 (Save 77%) $2.99 Blazin' Deal
Image of Geissele Super 42 Braided Wire Buffer Spring And Buffer Combo, H2 made-in-usa-flag 2 models Geissele Super 42 Braided Wire Buffer Spring And Buffer Combo, H2 (235) As Low As (Save Up to 30%) $114.00 Best Rated
Image of TRYBE Defense Standard Handguard Barrel Nut TRYBE Defense Standard Handguard Barrel Nut (30) List: $18.99 (Save 98%) $0.44 Blazin' Deal
Image of Radian Weapons Glock 43X 9mm RAMJET Barrel w/ AFTERBURNER Compensator 5 models Radian Weapons Glock 43X 9mm RAMJET Barrel w/ AFTERBURNER Compensator (41) As Low As (Save Up to 18%) $389.95 Best Rated
Image of Streamlight TLR-7 Hl-X USB Multi-Fuel Rail-Mounted Flashlight 2 models Streamlight TLR-7 Hl-X USB Multi-Fuel Rail-Mounted Flashlight (104) As Low As (Save Up to 47%) $177.99 On Sale
Image of Streamlight TLR-7 HL-X 1913 Sub USB Multi-Fuel High-Lumen Rail-Mounted Light Streamlight TLR-7 HL-X 1913 Sub USB Multi-Fuel High-Lumen Rail-Mounted Light (77) List: $330.40 (Save 46%) $177.99 On Sale
Image of Strike Industries Polymer FSA Picatinny Folding Stabilizing Brace Strike Industries Polymer FSA Picatinny Folding Stabilizing Brace (17) List: $99.95 (Save 10%) $89.95 Best Rated
Image of Magpul Industries PMAG GEN M3 AR-15 .300 Blackout 30 Round Rifle Magazine 5 models Magpul Industries PMAG GEN M3 AR-15 .300 Blackout 30 Round Rifle Magazine (42) As Low As (Save Up to 12%) $15.75 Best Rated
Image of DFCO Kung Fu Grip Plug DFCO Kung Fu Grip Plug (25) List: $12.00 $11.99 13% Coupon
Image of DFCO Tiger Claw Fore M-Lok Grip 10 Degree with Grip Plug Kit DFCO Tiger Claw Fore M-Lok Grip 10 Degree with Grip Plug Kit List: $32.00 (Save 15%) $27.35
Image of Breek Arms AR-15 Warhammer Mod2 Ambidextrous Charging Handle made-in-usa-flag 4 models Breek Arms AR-15 Warhammer Mod2 Ambidextrous Charging Handle (577) List: $54.95 (Save $5.00) $49.95 13% Coupon
Image of DFCO Kung Fu Grip, Black 13 models DFCO Kung Fu Grip, Black (143) As Low As (Save Up to 15%) $19.99 13% Coupon
Image of AS Designs Arc-Fire V2 Non-Ambi Kit AS Designs Arc-Fire V2 Non-Ambi Kit (15) $199.99 Best Rated
Image of Radian Weapons Glock 43X/48 Anchor and Pistol Magwell 3 models Radian Weapons Glock 43X/48 Anchor and Pistol Magwell (55) As Low As (Save Up to 36%) $109.95 Best Rated
Image of Superlative Arms Adjustable Bleed Off Gas Block 16 models Superlative Arms Adjustable Bleed Off Gas Block (308) List: $99.99 (Save 10%) $89.99 13% Coupon
Image of Bravo Company Mfg M-LOK Compatible Mod 3 Vertical Grip 2 models Bravo Company Mfg M-LOK Compatible Mod 3 Vertical Grip (242) As Low As (Save Up to 45%) $20.99 13% Coupon

Remington Model 870 Magazine Extension Kit Unavailable & Discontinued Models

List of Unorderable Models

  • Remington Model 870 18in Magazine Extension Kit Adds 2 Extra shots Blued Stainless Steel, Blued 19419 , MPN: 19419 , UPC: 047700194196 , Code: RT-MZX-R870ME-19419-2RD
  • Remington Model 870 20in Magazine Extension Kit Adds 3 Extra shots Blued 19421 , MPN: 19421 , UPC: 047700194219 , Code: RT-MZX-R870ME-19421-3RD
  • Remington Model 870 18in Magazine Extension Kit Adds 2 Extra shots Blued Stainless Steel, Parkarized 19420 , MPN: 19420 , Code: RT-MZX-R870ME-19420-2RD
  • Remington Model 870 20in Magazine Extension Kit Adds 3 Extra shots Parkarized 19422 , MPN: 19422 , Code: RT-MZX-R870ME-19422-3RD
Compare (0)
1 item has been added
Add at least two items to compare
Last updated 2026-09-21 UTC.