Originally Posted By PreachermanMATT:
Also placed them and I also need to make it complete
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"Placed them"?
From the pics, you are missing the pivot pins, handguards, and handguard screws.
Are you trying to make 2 complete rifles? You have 2 metric barrels, but one metric lower and one inch lower. The sights on the inch pattern rifles are taller than the metric version, so the inch lower won't just work with one of the metric uppers without at least an metric rear sight.
You are also missing the complete bolt carrier assemblies, charging handles, bolt release, mag catches, top covers, locking shoulders, and related springs. Basically everything that goes into the missing upper receivers.