End cap coming unthreaded when firing?

[cms81586]

Has anyone noticed that after 80-100rnds of buck or slugs the end cap begins to loosen on their M4? I don't know if the detent on my M4 isn't picking up on the teeth of the endcap enough or if they're all like this. Any suggestions?

 

CMS

[Unobtanium]

Has anyone noticed that after 80-100rnds of buck or slugs the end cap begins to loosen on their M4? I don't know if the detent on my M4 isn't picking up on the teeth of the endcap enough or if they're all like this. Any suggestions?

 

CMS

 

Normal on all of the M4's I have owned. Just keep an eye on it/check it. If it really ticks you off, maybe some teflon tape or purple. PURPLE!!!! NOT BLUE OR RED! loktite.

[cms81586]

Thanks for the response. It don't bother me I just wanted to make sure it was normal and that I'm not the only one experiencing this annoyance.

 

CMS

[mudhen]

Happens on all the Benellis I have ever owned. Most Brownings too. Just keep checking it. I'll get a new cap every now and then if the notches get too worn down.

 

Crazy thing, I am shooting a Browing Maxus a bit these days, and I keep trying to check the mag cap

[texas skeeter]

maybe some teflon tape or purple. PURPLE!!!! NOT BLUE OR RED! loktite.

i LOL!!!!!

[StrangerDanger]

Never had an issue on my M4. I usually crank it down as tight as I can.

[OhioM4]

Have you by chance installed a full length mag tube? I was wondering if the tube loosens from the receiver a little and then allows the nut to back off. I keep thinking there is a reason Benelli used that gooey thread lock stuff on the mag tube.

[cms81586]

No I still have the 5rnd tube and plug. I've checked that as well. After about 100rnds of medium to heavy loads I can get another quarter or half turn to tighten it back up. Not a big deal was just wondering if most of them did that. Thanks for the help guys!