10 rounds for pests IS legal, 10 round capacity for big game will cause some legal problems if you get checked by fish n feathers, even if only loaded to 5 in Alberta as per the regs.
Modern Sporter builds Q&A
- Thread starter alberta tactical rifle
- Start date
10 rounds for pests IS legal, 10 round capacity for big game will cause some legal problems if you get checked by fish n feathers, even if only loaded to 5 in Alberta as per the regs.
Correct, but predator’s (presuming coyotes and such) fall under small game reg’s.
BCreserveMP
Regular
- Location
- Victoria, BC
Ruh-ro, I have one of those on the way. What seems to be the issue? Do you think once the internal spring in the cover wears in a little bit it'll work? Or is it a case of the Brownells BCG not contacting the cover when it travels rearward?
Have you tried another carrier?
I've had no issues with this bcg in a couple other rifles. I wonder if there is a small dimensional difference there or if it's the cover?
What cover are you using?
BCreserveMP
Regular
- Location
- Victoria, BC
Two different guys having the same issue... Odds are it's not the cover. I looked online to see if anyone else is having this issue and couldn't find anything. I wonder if there's a slight difference between the area around the ejection port on the MS and a typical AR.
In any event, yeah, running a bead of epoxy along the contact point of the cover should do the trick. Another option is to shave a very slight amount
from the tip of the plunger that keeps the cover closed. Maybe even cycling it a few dozen times would help. I know from experience that worn covers tend to spring open with just the jolt of the action being racked. I had one like that in basic and got jacked for it every day because it was always open
Edit: I haven't got my MS yet but my lightweight carrier *should* be arriving today if my Postie isn't too traumatized by the snow. I'll try it in my MDI and see if it works.
Must be related to the larger ejection port. When my mil spec bolt is installed there is a gap above it whereas in a regular AR the bolt seals up the entire ejection port (as designed to prevent ingress of dirt etc)
It’s stacked tolerances with both the bcg and the door.
The strike door works fine with all my bcg except the lightweight brownells.
The brownells bcg opens the other doors I’ve tested fine ( milspec and v7 )
These are just the joys ( and frustrations ) of building anything custom. Custom cars are no different, many times the parts work fine with standard parts, but start mixing and matching and you often end up with non compatible items.
On a side note, my strike door on my stag took some trimming and filing before it would fully seat and open.
The strike door works fine with all my bcg except the lightweight brownells.
The brownells bcg opens the other doors I’ve tested fine ( milspec and v7 )
These are just the joys ( and frustrations ) of building anything custom. Custom cars are no different, many times the parts work fine with standard parts, but start mixing and matching and you often end up with non compatible items.
On a side note, my strike door on my stag took some trimming and filing before it would fully seat and open.
Two different guys having the same issue... Odds are it's not the cover. I looked online to see if anyone else is having this issue and couldn't find anything. I wonder if there's a slight difference between the area around the ejection port on the MS and a typical AR.
In any event, yeah, running a bead of epoxy along the contact point of the cover should do the trick. Another option is to shave a very slight amount
from the tip of the plunger that keeps the cover closed. Maybe even cycling it a few dozen times would help. I know from experience that worn covers tend to spring open with just the jolt of the action being racked. I had one like that in basic and got jacked for it every day because it was always open
Edit: I haven't got my MS yet but my lightweight carrier *should* be arriving today if my Postie isn't too traumatized by the snow. I'll try it in my MDI and see if it works.
Yes the ejection port IS different between a Sporter and an AR, the Sporter is bigger so as to better accomodate big bore cartridge, this was discussed a fair bit back when the uppers were still in the infancy stages.
Some of the light weight carriers have the sides of the carrier scalloped out to remove weight. If the carrier can't contact the port door due to material missing the door then has to wait for the bolt head end which has not been altered to do the job.
Anyone try a 22lr kit yet? My bolt doesn’t work, looks like the upper is shorter then an AR15 upper by .175 thou, the end of the BCG sticks out and there’s a tab at the back up top to retain the BCG return spring.
The pictures show the tab and why it won’t work how it’s currently set up. The only part I can see modifying is the area the BCG locks into the barrel, skim that down on a lathe .175” and the whole carrier moves into the upper. Might have to get a different setup if this doesn’t work.
Or cut a notch in my lower where the tab would go...
The pictures show the tab and why it won’t work how it’s currently set up. The only part I can see modifying is the area the BCG locks into the barrel, skim that down on a lathe .175” and the whole carrier moves into the upper. Might have to get a different setup if this doesn’t work.
Or cut a notch in my lower where the tab would go...
Anyone try a 22lr kit yet? My bolt doesn’t work, looks like the upper is shorter then an AR15 upper by .175 thou, the end of the BCG sticks out and there’s a tab at the back up top to retain the BCG return spring.
The pictures show the tab and why it won’t work how it’s currently set up. The only part I can see modifying is the area the BCG locks into the barrel, skim that down on a lathe .175” and the whole carrier moves into the upper. Might have to get a different setup if this doesn’t work.
Or cut a notch in my lower where the tab would go...
That's one of the ways they got it nr was shortening the upper and making the back of the lower thicker. My bcg sticks out of the upper the same amount
Anyone try a 22lr kit yet? My bolt doesn’t work, looks like the upper is shorter then an AR15 upper by .175 thou, the end of the BCG sticks out and there’s a tab at the back up top to retain the BCG return spring.
The pictures show the tab and why it won’t work how it’s currently set up. The only part I can see modifying is the area the BCG locks into the barrel, skim that down on a lathe .175” and the whole carrier moves into the upper. Might have to get a different setup if this doesn’t work.
Or cut a notch in my lower where the tab would go...
My BCG sits proud of the upper even when it is at its farthest point in travel.
I thought that it was a little unusual but if you push the upper backwards the carrier engages the buffer and closes the gap.
It seems like that’s how it was designed to work.
Unless the tab at the rear end of the BCG is too tall to fit inside the buffer tube... it’s hard to tell from the pictures.
Sorry, the tab is too tall, it won’t slide back as it does with regular BCG’s.
Lol I tried pushing back pretty hard before realizing the tab was stopping me.
ATRS Shaun
Business Member Rep.
- Location
- Calgary, AB
Well that's just frustrating... Which brand of 22 kit is this?
Gonna have to take a look at what we can do to get this working.
It’s a Spikes Tactical Kit, I gutted an upper. I have a lower in run 2, if you can cut a notch over the buffer tube loop I’m happy with that (if there’s an extra cost for machining I’d also understand). The charging handle would cover the notch anyways. The more I look at it the more I think the barrel needs that material, it’s right where the chamber ends.
