P80 Locking Block Fixes by MGB

Marine Gun Builder provides an in-depth review of everything a new Polymer 80 Glock builder will need to execute a first time quality P80 build. Marine Gun Builder covers all the steps builders need to take to get a perfect P80 build.

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If you dont want to mess with P80 crappy rails one can buy Rook T. rails around $35-$50 ea for your build here.(when they back in stock)
https://www.rooktactical.biz/shop?Collection=RAILS
Under no circumstance, DO NOT open your holes up to fit the rails, it will mess your trigger and you will have jams and malfunctions.
You must make sure they sit even front to back and level with each other(front block with rear rails) for your slide to move evenly.
Semper-Fi
Do or Die