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WE "Open Bolt System" Complete Conversion Kit for WE M4 Airsoft GBB Rifle

ID: 37349 (Kit-WE-OB-M4)
4.0 stars, based on 1 reviews
WE Open Bolt System Complete Conversion Kit for WE M4 Airsoft GBB Rifle
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The WE Open Bolt M4 Kit will allow you to convert your old AWSS M4 (Brass Bolt System) into the new realistic Open Bolt system. The kit includes a completely assembled Inner Barrel with Hopup Assembly (inner barrel, hopup bucking, hopup shell), a complete Bolt Assembly (bolt housing, nozzle assembly), Complete Trigger Group, magazine lip/seal conversion set (follower, mag seal, mag lip), and other small parts necessary for the conversion.
The Open Bolt system combines reliability, realism, and easy maintenance to create a new high standard for Quality Gas Blowback Rifles. These and many more WE parts are available at factory direct pricing only at

Need to convert your old mags? Click here for the Open Bolt mag lip set.

Materials: Aluminum, High Impact Polymer, Steel
Package Includes: Inner Barrel w/ Hopup Assembly, Complete Bolt Assembly, Magazine Conversion Set, Trigger Group, Dust Cover, Bolt Catch, Pin Punch Tool
Manufacturer: WE

California residents click here for Proposition 65 warning

1 Customer Review

(Write a review)

by Kevin P. on 12/02/2012
"Overall, i gitve this a 4/5. All the parts work very well, and i recommend you watch ideos on youtube before trying to install by yourself (unless you take it in to a sotre and have them convert it for you). The installation was easier that way and everything was fine. Very poleased with this, but there is one issue: the bolt catch piece does not catch when the mag is empty. Unlike the AWSS version, this piece comes shave off a bit more so that it never meets with the bolt, so there will be dry firing issues and you might waste some gas.

-Easy installation, once you know what your diong
-All the parts (exept one) work after install

-Bolt catch does not "catch"

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