Makasi mk15 initial overview and issues

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AuntJemima

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Most problems have been fixed, basically every issue outlined in the early reviews has been dealt with but now we’re having actual function problems instead of what was mostly cosmetic issues.


The rifle i received from rdsc is having out of battery issues. Once again, as seen on that previous NR Makasi review as posted by CRAFM, specifically with duramags. First couple mags with pmags were also getting stuck out of battery but seemed to correct itself. Duramags however, cant even get through 4 rounds in a mag before *click*. From what i can see, this rifle has pretty bad bolt bounce issues that cant just be corrected with a new buffer weight like an ar. Im going to put an additional 100 rounds of 5.56 on top of the 80 223 i ran through it but so far things are looking hairy… hopefully it kinda wears itself in and fixes itself i guess. Attached is an image of where the bolt likes to get itself stuck.
 

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AuntJemima said:
Most problems have been fixed, basically every issue outlined in the early reviews has been dealt with but now we’re having actual function problems instead of what was mostly cosmetic issues.


The rifle i received from rdsc is having out of battery issues. Once again, as seen on that previous NR Makasi review as posted by CRAFM, specifically with duramags. First couple mags with pmags were also getting stuck out of battery but seemed to correct itself. Duramags however, cant even get through 4 rounds in a mag before *click*. From what i can see, this rifle has pretty bad bolt bounce issues that cant just be corrected with a new buffer weight like an ar. Im going to put an additional 100 rounds of 5.56 on top of the 80 223 i ran through it but so far things are looking hairy… hopefully it kinda wears itself in and fixes itself i guess. Attached is an image of where the bolt likes to get itself stuck.
Click to expand...
I wonder. Have you tried to run it with a wet bolt? Like soaked wet in CLP (keep the CLP off the ammo and chamber...but, soak the bolt and rails).
 
If it's just metal mags try smoothing out the top of the feed lips with some sandpaper. Maybe it's just gonna take a few hundred rounds to break in.
 
True Shadows said:
If it's just metal mags try smoothing out the top of the feed lips with some sandpaper. Maybe it's just gonna take a few hundred rounds to break in.
Click to expand...
Kinda thinking that may be the case. Gonna give it a try but more so under the feed lips as theres no evidence of contact on the tops of the feed lips. It just really isnt cooperating with slightly tight mags at all. Even 4 rounds in a steel duramag pistol mag is too much for my gun it seems.
 
Kinda contradicting. Is it bolt bouncing or bolt dragging? It can't be both. Given that it is observed with one type of mags I would probably bet on dragging.
Bolt bouncing would be harder to address on this system.
 
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Horilka said:
Kinda contradicting. Is it bolt bouncing or bolt dragging? It can't be both. Given that it is observed with one type of mags I would probably bet on dragging.
Bolt bouncing would be harder to address on this system.
Click to expand...
yeah I wonder if it's the bolt indeed making uncessary contact and just dragging..that video from CRAFM with the bolt not in battery looked like it just stopped short. I'm not an expert, but could polishing the bolt help?
 
Horilka said:
Kinda contradicting. Is it bolt bouncing or bolt dragging? It can't be both. Given that it is observed with one type of mags I would probably bet on dragging.
Bolt bouncing would be harder to address on this system.
Click to expand...
I can physically see the bolt bouncing out of battery on a slow mo vid so likely what it is.
 
AuntJemima said:
I can physically see the bolt bouncing out of battery on a slow mo vid so likely what it is.
Click to expand...
That's very bad news. Manufacturer would need to address this with thorough testing and balancing BCG mass, springs, cam geometry. Or introduce some inertia pellet of bar. Or ramp/protrusion like in BNR 180 Gen 3 that kicks the BCG sideway on closing...
You should post this slow mo video. Manufacturer is listening via importers. When you document and provide evidences they listen.

P.S. I said "it can't be both" and I was wrong. What could happen is bounced BCG could hand up on the lips of the magazine that he was able to overcome with initial force of bolt going forward.
 
what are these markings/scrapes? is that the bolt grinding on the receiver?

1791168941287.png
 
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AuntJemima said:
Most problems have been fixed, basically every issue outlined in the early reviews has been dealt with but now we’re having actual function problems instead of what was mostly cosmetic issues.


The rifle i received from rdsc is having out of battery issues. Once again, as seen on that previous NR Makasi review as posted by CRAFM, specifically with duramags. First couple mags with pmags were also getting stuck out of battery but seemed to correct itself. Duramags however, cant even get through 4 rounds in a mag before *click*. From what i can see, this rifle has pretty bad bolt bounce issues that cant just be corrected with a new buffer weight like an ar. Im going to put an additional 100 rounds of 5.56 on top of the 80 223 i ran through it but so far things are looking hairy… hopefully it kinda wears itself in and fixes itself i guess. Attached is an image of where the bolt likes to get itself stuck.
Click to expand...
When did RDSC recieve their NR rifles??
 
AuntJemima said:
https://imgur.com/a/yVSUsg3
Heres a better video than previous showing the significant bolt bounce.
Click to expand...
Even in AR15 some bouncing is present. What matters is how far it rebounds and whether it stays displaced. Do these tests with two types of mag - the one that gave you no issues and with those, what were they - Duramags? See the difference and if it sticks on Duramags.
 
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