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AIRSOFTCON 2026 - October 17, 2026

King Arms Bolt Catch for M4 / M16 Series Airsoft AEG Rifles

ID: 43941 (KA-M4-38)
KA-M4-38
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King Arms

$12.00

This item is currently Sold Out

Order within 6 hours 48 minutes Receive as soon as Wed Jul. 15

Product Description

Compatibility: For King Arms and other compatible M4/M16 Series Airsoft AEG Rifles with Working Mock Bolt Catch Systems (Not compatible with Non-Working Bolt Catch Systems)
Material: Metal Alloy

Manufacturer: King Arms

4 Customer Reviews

(Write a review)

by Collin H. on 03/02/2025
"Bought this for my Cybergun Microswitch M4*. The King Arms catch is significantly bigger than the Cybergun’s but it just barely fits into the frame and works perfectly fine.

Thanks! I think this will work on most AEG M4s.
by Collin H. on 03/02/2025
"I don’t have a King Arms M4, but I purchased this for my matrix Sportsline M4. The bolt catch broke on mine so I bought this to replace it. It’s significantly bigger and thicker but it works so I’m satisfied.

I’m pretty sure this will work on most other M4 AEGs with bolt catches
by Torrey S. on 01/06/2020
"Works great on my Kingarms m4 it's the Evike Custom scorpion Edition to be specific. And it's a fuctional release on my gun so if it is on yours make sure you push down the little black piece on the right side of the reciever when installing the bolt release.

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King Arms

About King Arms

King Arms was founded in 2004 with the mission to ensure optimum customer satisfaction by providing precision products and outstanding service. In 2015, we moved our headquarters from Hong Kong to Taiwan where we've continued to provide excellent products with the highest quality. While working with leading firearms manufactures, we provide to our customers a level of innovation and authenticity that can't be found anywhere else in the Airsoft industry. This goal is what continuously drives us to improve and gives us purpose.