These laws are weird.
Makasi Canada Non Restrcited Rifle: A machinist tear down PIC HEAVY
- Thread starter Armedsask
- Start date
Bolt bounce can be a big problem.
Possible manufacturing issue.
Barrel extension is cut for M4 feed ramps. Upper receiver IS NOT!!! Projectiles are scratched up on loading. Accuracy pretty good so far despite that. Feeding fine from steal mags. Got 3 light primer strikes in the first 10 rounds. I consider that break in period.
I've contacted RDSC to check if others are like this.
Barrel extension is cut for M4 feed ramps. Upper receiver IS NOT!!! Projectiles are scratched up on loading. Accuracy pretty good so far despite that. Feeding fine from steal mags. Got 3 light primer strikes in the first 10 rounds. I consider that break in period.
I've contacted RDSC to check if others are like this.
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Right, you are correct. That would also explain why I had zero feeding issues.
I am very impressed with this rifle and its performance.
bath it in oil!!!!!
That sounds like the bolt bounce. If it continues ......
...... What? What do you expect to happen aside from the issue resolving itself as the rifle "breaks in"?
Won’t bolt bounce get worse as a rifle breaks in and the parts wear into each other causing less resistance?
The backland hunters had the opposite problem as there was too much resistance and the bolt wouldn’t quite go into battery but as they broke in the issue mostly went away
Once the bolt turns and locks in it shouldn’t “bounce back out” unless I’m not quite understanding something here?
The backland hunters had the opposite problem as there was too much resistance and the bolt wouldn’t quite go into battery but as they broke in the issue mostly went away
Once the bolt turns and locks in it shouldn’t “bounce back out” unless I’m not quite understanding something here?
Someone beat me to it, but as the rifle breaks in there will be less drag on the bolt carrier, which will cause it to hit the back end of the barrel a little bit harder, resulting in more bounce.
The AR15 has moving buffer weights for a reason. Those are anti-bounce weights.
Bolt bounce is a bit subtle. The bolt itself doesn't have to bounce back so far as to unlock the bolt. Only the carrier has to bounce back just slightly so as to absorb enough energy from the hammer fall to result in light primer strikes. All modern rifles are designed to prevent the hammer hitting the firing pin until the bolt carrier is fully forward.
I suppose I should have stated it another way. Makasi owners experiencing light primer strikes during early break-in, presumably arising from "bolt-bounce", have found that the incidence of light-strikes resolves itself in short order. The result once consistent Bolt-Catch engagement on an empty Magazine has been achieved, is typically 100% reliability thereafter. So, bolt-bounce doesn't appear to be the actual culprit behind the light strikes, because bolt-bounce wouldn't be expected to resolve itself, Right? Now, does THAT make better sense?
There is at least one slow-motion video floating around out there purporting to demonstrate Makasi bolt-bounce. And it does. Except for the fact that there is no ammunition being fed from the magazine into the chamber. That's a problem, because introducing ammo typically eliminates bolt-bounce by slowing the speed at which the Bolt closes and the Bolt-Carrier impinges on the Barrel Extension (the latter being the actual cause of "bolt-bounce"). Showing a video of a Bolt & Carrier slamming home on an empty chamber and crowing about the resultant "bolt-bounce" is dishonest in the extreme. Every single rotary-bolt semi-auto that I own exhibits bolt-bounce on an empty chamber!!
There is at least one slow-motion video floating around out there purporting to demonstrate Makasi bolt-bounce. And it does. Except for the fact that there is no ammunition being fed from the magazine into the chamber. That's a problem, because introducing ammo typically eliminates bolt-bounce by slowing the speed at which the Bolt closes and the Bolt-Carrier impinges on the Barrel Extension (the latter being the actual cause of "bolt-bounce"). Showing a video of a Bolt & Carrier slamming home on an empty chamber and crowing about the resultant "bolt-bounce" is dishonest in the extreme. Every single rotary-bolt semi-auto that I own exhibits bolt-bounce on an empty chamber!!
Yes it does. Thank you.
I disagree with you that the OP is dishonest. Things like Bolt Bounce is not a day to day issue for many to encounter. I will venture to say that 99% of the consumers who purchase a firearm have never ever heard the term bolt bounce. This is a thing that was studied a lot because all these title 2 people in the US who made MG, using part kits and semi auto hosts. Other than that, it is a designer problem and it should not be encountered by gunsmiths or regular weapon tech - maybe the movie gun people who do conversion.
Like bolt bounce happens, the key is to make sure the hammer falls after the bounce cycle is completed. We can see why it is important in FA but in SA human trigger normally doesn't run in the same bandwidth as FA.
I took a slow motion video of my bolt bounce with an empty mag inserted (before firing anything). It was considerably less severe than the other user's video of a completely empty rifle, but still looked concerning to me, hence my comment. On a loaded magazine, pushing a cartridge, I'm sure it would be even less. I'll maybe get a video at the next range trip.
Light primer strikes stopped after the first 50 rounds. Rifle functioned fine. Bolt bounce doesn't seem to be an issue. Total light strikes sits at 4 in the first 100 rounds.
Light primer strikes stopped after the first 50 rounds. Rifle functioned fine. Bolt bounce doesn't seem to be an issue. Total light strikes sits at 4 in the first 100 rounds.
Your incidence of bolt-bounce WILL be considerably less (or non-existant) when pushing a cartridge under spring tension out from under the magazine lips and into the Chamber. Simple physics dictate that this will be the case.
Correct. The amount it was reduced just from pushing on a mag follower was a lot compared to the other thread. I thought I had some 5.56 snap caps to try but I can't find them.
People need to just shoot their guns. Stop nitpicking through trying to find any tiny problem before it's actually a problem. Time will tell ultimately. I was thinking this would be the lesser of the two new NR rifles. I'm reconsidering that viewpoint.
As an aside, I'm seeing a lot of the usual gun owner (and internet in general) stuff going on with this rifle. The less experienced users are the most vocal reviewers.
Painkillers
CGN Ultra frequent flyer
There does seem to be some fairly serious problems with the platform. Perhaps not your particular example, but that isn't to say all the rifles are fine. They aren't.
