Gfarm Posted January 15, 2024 Posted January 15, 2024 Can anyone tell me what size screw plugs I need to cover the top pic rail holes in the receiver of an M4. I am planning to remove the top rail for a more streamlined look and since I really like the ghost ring sights. I’ve heard 8-40 will and won’t work. Any help ?? Quote
Gmcrigger2007 Posted February 3, 2024 Posted February 3, 2024 On 1/15/2024 at 8:00 PM, 03svt said: Yes they will. What I used Did have to use Blue Loctite to keep the new screw plugs from loosening up ? I'm thinking of taking the factory rail off as well. Quote
03svt Posted February 4, 2024 Posted February 4, 2024 Yes they shot loose I expected them to, under the rail when I removed it and the screw holes were very oily. I just removed a couple to install my new venom mount and so I’m going to clean them all up and put a tiny drop of purple loctite. Quote
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