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Questions & Answers
does this have a perkerized finsh to match a synthetic Remington 870

Blued - not matte!

by dublin017, Verified Owner, June 17, 2025
I have an 870 20 gauge made in 1963. When I insert a 12 ga shell in the magazine it goes in part way and jams. Would the 12ga extension tube work? Expert Answer

The Choate Tool Remington 870/1100/1187/Versamax 7 Shot Extension 12 Gauge+2 Rounds is for 12 guage shotguns only. You cannot shoot a 12 gauge shell in a 20gauge shotgun. Please email us at techsales@opticsplanet.com.

by Hunter, Gear Expert, April 21, 2023
Customer Reviews
Helpful Positive Review
Just what I needed by Monreal Williams, Verified Owner, January 16, 2024
I have a remington clone. When I first bought it, it came only 3 round capacity.i took the follower out and extended it to 5+1. Now it holds 7 high brass. 8 low brass. Looks menacing. Magazine tube sticks out a little further than the barrel. Love i...
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1/1 found this helpful
Helpful Positive Review
Item arrived in good timing and was exactly what was needed... The Remington 870 20 guage shotgun I own was made in 1955 and required a 12 guage magazine extender - which I ordered from Optics Planet.com The assembly was clean and did not require m...
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2/2 found this helpful
Most Recent Reviews
Works fine by Papa, Verified Owner, August 31, 2025
Seems like good quality. Works fine. Take care to ensure that spring doesn’t get hung up on the interface of the extension and the original magazine tube. If it does, slightly loosen the extension until the spring pops loose and fully extends. Then t...
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Most Recent Reviews
Perfect Fit by Adamthetactical, Verified Owner, July 13, 2025
Added to a ‘78 870 Slug gun. No dimples made it super easy to install. I like the orange follower, I can see it easier. My worry was it would stick out beyond the barrel and that was not the look I wanted. Luckily it still has about an inch to go. Wo...
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Most Recent Reviews
Choate Remington 870 mag extension by John, Verified Owner, February 21, 2025
Highly recommend this product. Excellent quality, 5 minute install. I have an older 870 so no retainer dimples or spring.
Most Recent Reviews
12 ga mag extension by Michael Selby, December 31, 2024
I bought this for my son for Christmas, and we are both extremely satisfied with the extender! Outstanding quality and fit, great price, and very easy to install. I highly recommend Optics Planet and their products!
Read All 7 Reviews
Magazine Capacity:
7 Round
Condition:
New

Code: OP3-MZX-CHTL231-CMT-01-04-02-7RD

MPN: CMT-01-04-02

UPC: 681920833871

List: $67.99Save $6.00
$61.99

made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Choate Tool Remington 870/1100/1187/Versamax 7 Shot Extension 12 Gauge+2 Rounds

Increase your fire power of your shotgun with a Choate magazine extension kit. These kits are constructed of solid blued steel and come with 1 Magazine Extension 6,7,8, 9 or 10 shot, 1 Base Clamp, 1 High Visibility Shell Follower and long spring.image

Fits 12 gauge Remington 870/1187/Versamax shotguns, for 20 gauge guns made before 1987 your gun might be made on a 12ga receiver. If your magazine tube will take a 12ga shell then you have one of the older guns that needs the 12ga extension.

Using the 7 shot extension as an example shotgun capacity for a magazine extension is figured 1 round in the chamber and 6 rounds of 2 3/4 inch shells in the magazine tube. The new model Remington 870/1187/Versamax shotguns have dimples that will have to be drilled out with 3/16 drill bit before the spring will extend up into the magazine extension. The older model Remington 870/1100/1187will readily accept our extensions without any alterations.

Specifications for Choate Tool Remington 870/1100/1187/Versamax 7 Shot Extension 12 Gauge+2 Rounds:

Manufacturer: Choate Tool
Magazine Capacity: 7 Round
Condition: New
Country of Origin: USA

Features of:

  • Adds +2 shotshells
  • Machined from steel

Package Contents:

  • Choate Tool Remington 870/1100/1187/Versamax 7 Shot Extension 12 Gauge+2 Rounds
  • Spring
  • Follower
  • Clamp

Choate Tool Remington 870/1100/1187/Versamax 7 Shot Extension 12 Gauge+2 Rounds Orderable Models

List of Orderable Models

  • Choate Tool Remington 870/1100/1187/Versamax 7 Shot Extension 12 Gauge+2 Rounds,12 Gauge, CMT-01-04-02 , MPN: CMT-01-04-02 , UPC: 681920833871 , Code: OP3-MZX-CHTL231-CMT-01-04-02-7RD
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