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Guntec USA AR-15 Complete Lower Parts Kit
As Low As $71.99 Save Up to 15%
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Damien's Review of Guntec USA AR-15 Complete Lower Parts Kit

The screw for the grip was the complete wrong thread for my mil spec lower.
The roll pin for the bolt catch was not going to ever fit. It was slightly too large even when the edges of the split were touching.
The pivot pin detent and spring combo was too long to allow me to install the pivot pin. I ended up using a spare spring I had laying around.
The safety selector didn’t index at 90° angles. It was vertical when in the fire position but was not horizontal when in the safe position. Again, I used one I had lying around. Much better indexing.
The disconnector didn’t fit too well into the trigger. There was a burr causing it to bind. Once the burr was dealt with it fit and functions properly.
These were the only parts I used. I didn’t trust the roll pin for the trigger guard and I just tossed it.
Would Recommend: No
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Last updated 2025-11-12 UTC.