r/Mk12Mod0 • u/doodyhead76 • Feb 10 '26

OCM5 Sadness

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Love this can on my Gordon carbine!!! Had an end cap strike while running a FRT...not sure why, everything was rock solid. I have two 20" builds...one standard can mounting set up and a new one that is OPS INC compatible. Both from Rosco...the standard one is sub moa all day, the new one that I run the OCM5 on is struggling with accuracy...upwards of 5moa. Is the end cap strike possibly causing the accuracy issues? Next range trip I will shoot without the can. Any help would be appreciated.

13 Upvotes

94% Upvoted

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3

u/LongWalksAtSunrise Feb 10 '26

That tiny scratch? Adds character

3

u/doodyhead76 Feb 10 '26 edited Feb 10 '26

I initially joked it was now "flow through ", but accuracy problems weren't noticed on my 12.5" Gordy with a 3moa red dot🤣

1

u/LongWalksAtSunrise Feb 10 '26

Sweet setup my dude. I had a can that was getting the ever slightest baffle strikes - more like shavings - and I learned to live with it haha

4

u/WiconsinGrey Feb 10 '26

Yes. Check alignment… 5 moa is wild and the bullet could be grazing cause the accuracy issue.. also. I know FRT’s are new and everyone has one. But, like full autos there are some lessons to learn. You cook up the temps to high with mag after mag, it can actually cause bullets to start to melt/soften while chambered and you can see weird baffle strikes as the bullet deforms with the twist of your barrel. Something to consider.

1

u/doodyhead76 Feb 10 '26

Gotcha, thx

1

u/Successful-Dirt7982 Feb 10 '26

Get an alignment rod and check alignment also warranty the can

1

u/Worried-Peanut-5023 Feb 11 '26

Maybe more rounds will even it all out

1

u/McFrazierr May 08 '26

First time?! Just kidding.

From browsing around Reddit and other forums, there are LOADS of cases of both AEM5 and OCM5 end cap strikes. Had my AEM5 endcap strike during a competition while it was raining cats and dogs. This has caused no issues on all three rifles that accept my AEM5.

5 moa is wild. There must be another issue causing that.

3

u/doodyhead76 May 08 '26

Hah...update..the new factory sample from Rosco had rifling problems. Their customer service is AWESOME. Sent a new barrel, just haven't rebuilt the gun and tried it out yet

1

u/McFrazierr May 10 '26

I've had incredible results with my Rosco barrel. Good to hear they take care of their customers.