CZ Bren2 Owner: Info, Pics, Mods

[AfroCowboy]

Can't seem to get PMC Bronze 55gr to cycle properly on regular gas setting. Mostly FTF and occasionally FTE, last round also fails to hold bolt open. Works fine in the adverse setting.

Federal XM 223 55gr worked like a charm on regular setting.

My rifle is the 8" version. Anyone ran into similar issues?

I think you have you're answer, and just need to note what ammo prefers what setting. Different ammo brands and weights will use different powders with different burn rates. Could be that PMC bronze produces some combination of: too much pressure, not enough gas, too fast of a burn rate for the barrel length.

The action is most likely still settling in? How many rounds have you cycled through the rifle? Rather than sanding and polishing, I've always been of the school to just keep everything that moves wet, sooner or later it will lap and polish itself to where it needs to be.

After 300rds and regular cleaning things got buttery for me both 5.56 and 7.62. You see wear on the carrier rails, carrier where it slides across and firing pin retainer on back of carrier. Not to mention the bolt lugs probably mate in a little too.

 

[AfroCowboy]

I got my rifle back from RDSC last week. They said their reamers were faulty and now they made it a custom chamber to my bolt instead of a mass produced spec.

The gas block is still touching the hand guard. Now it's pressing on it even harder. They said they shot a 1 MOA group with it.

Ditch or mill the handguard if it a concern and getting hot? Aftermarket parts plus aftermarket parts = tolerance issues.

 

[griffin86]

Ditch or mill the handguard if it a concern and getting hot? Aftermarket parts plus aftermarket parts = tolerance issues.

It’s not a tolerance issue, the gas block is cockeyed.

 

[Painkillers]

I think you have you're answer, and just need to note what ammo prefers what setting. Different ammo brands and weights will use different powders with different burn rates. Could be that PMC bronze produces some combination of: too much pressure, not enough gas, too fast of a burn rate for the barrel length.



After 300rds and regular cleaning things got buttery for me both 5.56 and 7.62. You see wear on the carrier rails, carrier where it slides across and firing pin retainer on back of carrier. Not to mention the bolt lugs probably mate in a little too.

Yep! Some folks erringly may take abrasives to these areas to try and get buttery earlier than 300 rounds. To the discenters, I was simply saying don't. Anyone doing so, has no objective idea how much or how evenly they are removing material. The gun will do so properly on it's own, it just needs to be run, and my practice is to do so excessively wet during this time. I believe it helps with mitigating any potential excessive wear occuring.

 

[themouser]

I have a Bren 556 11 inch barrel but thinking about getting a 762 rifle also
Wondering any recommendations whether I should go 9 inch barrel or 11?

 

[PhilRO]

I just joined the Bren2 game. Got one of the RDSC medium re-barrels. Will have to test it out but the barrel workmanship looks good on this batch. I just need to add a light and BUIS.

 

[CobraGT]

I just joined the Bren2 game. Got one of the RDSC medium re-barrels. Will have to test it out but the barrel workmanship looks good on this batch. I just need to add a light and BUIS.

It didn't come with BUIS?

 

[Saitama]

Congratz, I just bought one too from RDSC and still waiting for delivery. I hope the barrel is fine

 

[Tamalam]

I just took mine to the range. It's awesome. You should be very happy.

 

[PhilRO]

Didn't come with a BUIS, but that's ok, I wanted 45 degree offset anyways.

 

[PhilRO]

I just took mine to the range. It's awesome. You should be very happy.

Awesome. I can't wait to shoot it. I should have time over the holidays.

 

[PhilRO]

Congratz, I just bought one too from RDSC and still waiting for delivery. I hope the barrel is fine

My barrel looked good so fingers crossed it functions well. RDSC was very helpful during the purchase process, and they sent it in a very nice CADEX drag bag.

 

[Brian46]

Didn't come with a BUIS, but that's ok, I wanted 45 degree offset anyways.

I would still want the sights the rifle came with from cz even if not using them

 

[Adrenaline101]

The 16" versions didn't come with any factory sights.

 

[Death]

The 16" versions didn't come with any factory sights.

Not sure where you got that from. But my 16” came with buis

 

[misterplinker1]

Here's my understanding, don't take it as gospel but this is what I've observed:

If you bought your 16.5" "carbine" from IRG then it didn't come with BUIS. Only the "pistol" versions came with BUIS. If you bought your Bren from a Canadian retailer who got it from a Canadian distributor, they imported them directly from CZ and they all came with BUIS.

If you look at the CZ-USA website you can see only the pistol variants come with BUIS.

I believe you can distinguish your rifle from being a CZ-USA gun from a direct-from-Czechia import by looking on the upper receiver for "CZ-USA, KANSAS CITY, KS" laser engraving, which is part of import marks required in the USA. Also, the American 16.5" carbine from IRG came with a brake/flash hider, whereas the North Sylva/direct-from-Czechia 16.5" came with a twisted three-prong flash hider.

 

[pc9]

Anybody else have there stock/ cheek riser pin just fall out? Mine keeps falling out. A couple of vids I seen it supposed to have a retaining clamp but mine doesn’t.

 

[cptseawolf]

Not sure where you got that from. But my 16” came with buis

The ones from marstar (16") def did not come with BUIS

 

[CobraGT]

The 16" versions didn't come with any factory sights.

Mine did.

 

[MilsurpLover]

The 16.5” Brens from RDSC did not come with BUIS