I have several builds. Both dedicated Glock billet lowers and drop in mag blocks. Functionally I cant tell the difference between my standard AR with a KAK Colt pattern mag block and my Glock fed dedicated lower. They all function flawlessly.
The only questionable thing was the Glock lower with a specialized LRBHO upper. That was a hot mess that relied HEAVILY on the mag spring strength to function reliably. Other than that nuanced build I cant say anything bad about my others.
The only questionable thing was the Glock lower with a specialized LRBHO upper. That was a hot mess that relied HEAVILY on the mag spring strength to function reliably. Other than that nuanced build I cant say anything bad about my others.