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Are you sure it's not for the bolt release?I bought an Aero Precision Upper Receiver and it comes with an allen head screw instead of normal roll pin. Do I need to put any thread locker on the allen screw? I have always had to put a roll pin the secure the forward assist this is my first experience with an allen head bolt.
Are you sure it's not for the bolt release?
Wow, never heard of that. Let us know how it goes. As for loctite, I put blue on all things with threads unless it has a lock washer. I also add witness marks with a paint pen.https://www.aeroprecisionusa.com/m4e1-threaded-stripped-upper-receiver-black
Features:
- New enhanced forging that gives the upper receiver a "billet look"
- New picatinny profile that blends seamlessly with our Enhanced and ATLAS Series Handguards
- M4 Feedramps
- .250 takedown pin holes
- Laser engraved T-marks
- Includes threaded forward assist roll pin
- DOES NOT include port door or forward assist
Are you sure it's not for the bolt release?
Duly noted, however doesn't negate the possibility it could be used there.The bolt release is located on the lower.