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I just finished my first AR-15 build. Someone helped me assemble it and they were swearing quite a bit. The lower is an 80% unit - supposed to be a Cerro Forge and it was cerakoted when I got it. In order to get the upper and lower to mate, I had to do a little work with a file (mainly to take the cerakote off of the upper lugs. I also had to do the same to the magazine release notch.
The mag release seems to move smoothly now. The upper and lower go together fine and I can push the pins in by hand (the rear one required a pretty good amount of force before I made adjustments). The safety was also very stiff - it improved after the adjustments, but another problem arose.
Problem 1: It is VERY hard to get a full magazine inserted. If I remove a couple of rounds, it goes in easier.
Problem 2: With a full magazine installed, you can not pull the charge handle back at all. With a couple of round removed, you can pull it back, but it will not chamber a round.
Problem 3: With the firearm empty, you pull the charge handle and release it, then pull the trigger. The trigger operates fine, but once the trigger is in the already fired position, the safety is VERY hard to engage.
So, I am hoping that someone can offer me some guidance. I really don't want to trash this lower (I already had a serial number engraved and that was $50). Here is some additional information: The BCG is from Brownells - nickel boron finish, lightweight model. The trigger is an Elftmann match drop in. The barrel is an LBE .223 Wylde. The upper is from Guntec. I will post links to the items.
AR15 16" 5.56 M4 Barrel (this shows it as a 5.56, but the box is marked .223 Wylde)
The mag release seems to move smoothly now. The upper and lower go together fine and I can push the pins in by hand (the rear one required a pretty good amount of force before I made adjustments). The safety was also very stiff - it improved after the adjustments, but another problem arose.
Problem 1: It is VERY hard to get a full magazine inserted. If I remove a couple of rounds, it goes in easier.
Problem 2: With a full magazine installed, you can not pull the charge handle back at all. With a couple of round removed, you can pull it back, but it will not chamber a round.
Problem 3: With the firearm empty, you pull the charge handle and release it, then pull the trigger. The trigger operates fine, but once the trigger is in the already fired position, the safety is VERY hard to engage.
So, I am hoping that someone can offer me some guidance. I really don't want to trash this lower (I already had a serial number engraved and that was $50). Here is some additional information: The BCG is from Brownells - nickel boron finish, lightweight model. The trigger is an Elftmann match drop in. The barrel is an LBE .223 Wylde. The upper is from Guntec. I will post links to the items.
Guntec USA AR-15 Stripped Billet Upper Receiver & 15" Airlite KeyMod Handguard Set (Arctic White) | Tactical Transition
Our Artic White Complete Upper Receiver / KeyMod Handguard Sets for the AR-15 are available in a variety of colors. We ship fast and have great service!
tacticaltransition.com
M16 5.56 LIGHTWEIGHT BOLT CARRIER GROUP | Brownells
The Brownells M16 Lightweight Bolt Carrier Group is purpose-built for AR-15 owners looking to improve aspects of their rifle with a simple component swap, eliminating the need for major component replacement or amateur gunsmithing work. The Browne...
www.brownells.com
AR15 16" 5.56 M4 Barrel (this shows it as a 5.56, but the box is marked .223 Wylde)