I hope you do not mind if I post in english. I have been living in the US since 1990.
I saw this complete AR upper on sale for $200. 16" Wylde fluted 4150 barrel, side charger, complete with bolt group. Could not pass on it.
Slapped a scope on it and went to the range.
Sighted in at 10, 25 and then 100yds. The rifle would have been on paper at 100yds as is. A good sign.
Once sighted in, I shot 7 8-shot groups with 6 different commercial ammo. Shooting rapidly with the hand guard on a gear bag. The Hornady Black has shot well in my other ARs and did so again. Temperature was 20F, mild breeze.
Pretty good for a $200 AR complete upper, IMO.
See google photo album below for pictures.
I bought another cheap AR upper, from PSA, and it did not shoot as well, more like 2-3MOA with the Hornady Black.
BCA Budget AR sighting in (https://photos.app.goo.gl/rfsp4U56TseCH2nU6)
(https://lh3.googleusercontent.com/pw/AP1GczMGJqRm_N04VV4BeuSlkiYHY1Pb1xc3MmKQr-KY1fn_wuGQSBCYTzZSHNt7YL8v22-TDJ9fvvcP9c_LYoGSd3uZO17jZkQXXPfwFVl9Hvmq7BZB0RgxLIADaqffnXBgQNyrNIXMX013NB8KFF6WgIX2Iw=w1637-h1228-s-no-gm?authuser=0)
(https://lh3.googleusercontent.com/pw/AP1GczMcwXFSofzWD0yQr1hVnmJ3e4JdssQRKe3vjiJdMwI-7DSXYeRtaJcr51ChpSdulMwIKNhLOUco334fHwaWW_p-ZAkYgMQSaYJJr5AK9wvxh2UodivdAGPA3G-jhLdj5pzg0Kn-cD6P4MpgFnRxYDiNuw=w1637-h1228-s-no-gm?authuser=0)
Here's the PSA cheapo AR test with the same ammo:
PSA cheap AR test (https://photos.app.goo.gl/jdcjYWVkj6iUnmm48)