In this article, I will give you a detailed description of my Norinco CQ-A carbine tuning (the M4 carbine Chinese clone with 5,56х45 caliber).  

This tuning was made for participation in practical shooting competitions (and other varieties of dynamic shooting) in Open class. It’s obvious, that it will be useful during the hunt. I make a notice at ones, that there are many opinions concerning carbine changing, what has to be replaced and what is going to stay. 

Therefore, I’m not claiming to be in possession of the absolute truth and give you only my point of view on this matter. Also, I would like to add that the main parts were not changed, so the tuning doesn’t break any law.

Of course, you can fire it without any tuning but if you have a desire to improve your sports results (even as an amateur) and especially in Open class, you will definitely need appropriate modifications and additional improvements. 

Firstly, I decided to change an authorized flash hider to a valid muzzle brake compensator (MBC) to decrease a recoil and compensate muzzle tossing. This is necessary to accelerate the destruction of targets by two shots - you can make a split much faster at short distances. There are plenty of MBC for AR-like. Here the most popular MBCs are Jerry Miculek, Arredondo, SJC Titan, etc. I chose a SJC .223 Titan, it was suggested by my colleague but if I had a chance I would have tested them all one by one.