It features an improved HOP system that incorporates the expertise of competition-specific guns, and the magazine lip has been changed to a plastic part to prevent scratches during loading. The rail also uses a free-float type that does not put stress on the barrel, achieving high accuracy beyond the limits of a short carbine. Furthermore, the bolt area has been tuned up to further improve stability during rapid fire. The receiver is engraved with the US Arsenal type, which uses a free-float rail, and this tactical version is equipped with an ambidextrous selector and mag catch.
Weight: 3,165g
Overall length: 753mm (671mm when stock is shortened)
Magazine capacity: 40 rounds
Firing mode: semi/full auto
![[KSC] M4 CQB-R Gas Blowback](http://rock-et.jp/cdn/shop/products/m4_cqbr_01_1024x1024.jpg?v=1617079481)
![[KSC] M4 CQB-R Gas Blowback](http://rock-et.jp/cdn/shop/products/m4_cqbr_02_1024x1024.jpg?v=1617079481)
![[KSC] M4 CQB-R Gas Blowback](http://rock-et.jp/cdn/shop/products/m4_cqbr_03_1024x1024.jpg?v=1617079481)
![[KSC] M4 CQB-R Gas Blowback](http://rock-et.jp/cdn/shop/products/m4_cqbr_04_1024x1024.jpg?v=1617079481)
![[KSC] M4 CQB-R Gas Blowback](http://rock-et.jp/cdn/shop/products/m4_cqbr_01_medium.jpg?v=1617079481)
![[KSC] M4 CQB-R Gas Blowback](http://rock-et.jp/cdn/shop/products/m4_cqbr_02_medium.jpg?v=1617079481)
![[KSC] M4 CQB-R Gas Blowback](http://rock-et.jp/cdn/shop/products/m4_cqbr_03_medium.jpg?v=1617079481)
![[KSC] M4 CQB-R Gas Blowback](http://rock-et.jp/cdn/shop/products/m4_cqbr_04_medium.jpg?v=1617079481)
