Pre/Post Ban

[ButcherBill]

Just a simple question,

Quite often Tanaka rifs are advertised as Post Ban... Why is that significant?

 

[Austeyr]

I'm 99% sure it's a Japanese thing related to power. Pre-Ban = "High power", which is really more our regular power and then Post Ban is low power to comply with Japanese law.

 

[Anonymoose]

They're gas bolt actions. Pre-ban had an external easily adjustable system for adjusting power, essentially an external NPAS as far as i understand.

Pre-bans being more desireable as they're very easy to adjust without any disassembly, and both pre- and post-ban guns being desireable due to very light bolt pull as there's no spring to compress.

 

[Punisher3990]

ngl i have often wondered this

 

[Impulse]

They're gas bolt actions. Pre-ban had an external easily adjustable system for adjusting power, essentially an external NPAS as far as i understand.

Pre-bans being more desireable as they're very easy to adjust without any disassembly, and both pre- and post-ban guns being desireable due to very light bolt pull as there's no spring to compress.

Click to shrink...

Yep, pretty much this. Pre-ban Tanakas have a screw in the bolt that regulates the power by blocking off part of the intake depending how far you close it, very much working the same as an NPAS. They're pre-ban, because Japan passed a law in the mid 2000s or so that meant Tanaka couldn't produce these adjustable bolts any more, so post-ban Tanakas are a lot harder to adjust as you need to take the bolt apart and adjust the hammer spring tension to tweak the power, which is really fiddly, and getting the screws back in when putting the bolt back together is a pain.

Gas bolt actions are a bit like marmite. You either love them or you hate them. You really need to know how they work and what you're doing to get them running well and consistently. The benefits are the effortless bolt pull with no external line or tank (plus they feel incredibly nice to use due to functioning very similarly to the real thing), but the drawback is that they just flat out aren't as consistent in power as spring or HPA setups because of how gas works. That said, they're more than consistent enough, and the only bolt actions I really use these days are my gas ones (and I have... quite a collection of them...)

EDIT: This is a pre-ban Tanaka. That large screw is how you regulate the power, as it blocks off the intake depending how much you close it