Davegolf

Stock TM or Prommy barrel work great for accuracy, the latter more so. If you are looking for high (DMR) FPS then get a longer barrel otherwise 250-350 is most accurate. A TNT style bucking will not work with a SixG Super Nub, you'd essentially have to concaves. Start out with a healthy/new TM bucking & Super Nub combo as a baseline for performance. This will overhop 0.36 in the cold no problem.

I wouldn't advise using a 6.00 You need to keep a minimum 0.08 mm clearance between the barrel and BB. Barrel diameter 6.03 - BB diameter 5.95 = clearance 0.08 Otherwise you have a much greater chance of the BB touching the barrel interfering with its spin, and much more chance of dirt blocking / damaging the barrel / BB

And you deserve a standing ovation for your English (cos my Portuguese is non existent) and for actually reading the thread! The 6.03 or 6.05 will both serve you well, the FPS variation over 40mm of barrel is negligible. That said are you limited to 1.3J on 0.2g?

Modify Tan works great with the nub, essentially youre looking for a simple patch contact shape (TM / Modify) that gives the best nozzle seal, the stock TM is great, the Modify seals a little better, so gives better shot consistency.

Yeh the Madbull ones are a browny colour, but odd. If you do go ACOG I can recommend an unbelievably good quality one i found, will have to check what and where it came from.

CASV old skool cool, L119 yawn

Unconvinced yourself to do a...

Im pretty sure ive spotted fellow softers looking on enviously when you reload

Hi @Daanios, nice choice of RIF! 1.3J @ 0.3g BB = 385 FPS @ 0.2g! Luckily working backwards with joule creep will reduce that. I think you need to decide how you want to use your MWS, but you get a lot of joule creep, so tune to your Holland limit of 1.3J on 0.3g BB, that should net you a lower joule reading on 0.2s, making it safe over here As per usual, don't get hung up on FPS with an MWS, they have exceptional range regardless, most of the time more FPS only gives faster time to target.

PS FPS Usually very consistent, naturally dropping slowly on gas, shouldn't be the case on HPA. @Wo1f has the fix, especially if you run HPA - it's dry air, no suspended lube as per airsoft gas.

Absorbs more of the harder Recoil, making everything happier. Makes the whole shot cycle faster. Better nozzle / bucking seating consistency. TIA? This Is Africa!? Only kidding

@M.a.r.v.i.n welcome!! As above, get a PTS ring, mil spec parts fit. Watch this space on the DMR front. Run the Super Nub, Modify bucking, stock TM barrel, high power gas, stiffer recoil buffer spring and high quality 0.32 or 0.36 BBs, that'll work awesomely for circa 60M

DANG! That last pic!!! If a jobs worth doing

^ He just sweared in here! Er 🤐 Yeh the spring that pushes the catch up.

Yeh very long!

Strange - but good - even at higher FPS than you've been running the ZET usually catches. Is the spring weak under the ZET?

Sounds to me like your bolt is not travelling fully. Look at your floating valve and or nozzle for gas leak issues, or light striking on your gas exit valves, sounds like lack of power.

I have TYPE 'A', the TYPE 'B' is identical just even lighter. It can only be a good thing! Faster cycle!

Hah yeh well we all know most upgrades are the complete opposite!!

@camden I have used the UAC lightweight bolt, it definitely speeds up the cycle time, needs less gas power to cycle properly, and reduces recoil. I had zero issues with it, however the reset roller is not very well supported, I machined a steel bush into it for the reset roller, I can do this again if you wanted.

Google Rhop it's well documented. Essentially an extended concave contact patch. Applies a lot of hop with very low pressure, centres the BB extremely well. The SixG Nub will hop most weights of BB, but again it is very good at centering the BB. Heavy BB weight is desirable in gas guns due to joule creep, which allows extended flat flight, which is also less affected by wind etc. Yes smaller the barrel higher the pressure, however it is best to have the BB float on a 360 degree cushion of air, without going into it deeply, 6.03 best compromise power (distance) and accuracy in MWS, 6.05 best accuracy. Id only use 6.01 in a pistol, and it needs to be kept cleaner than usual.

An Rhop'd Prommy is VERY hard to beat, TBH just a Prommy and good bucking is always a legit upgrade I find 6.01s are great in pistols if you keep it clean.

IME i really don't rate CJ barrels If your not looking for silly FPS the best accuracy is 300mm 6.03 / 6.05 by Prommy or PDI

The Autobot bucking has a concave shape to it and an elongated contact patch; The former helps centre the BB for consistency, the latter helps apply more backspin and give more range. I have found them to be inconsistent and are easily damaged. I think the diamond contact patch hurts accuracy as the BB will tend to run slightly off centre / take an inconsistent path and exit. Then also the Omega Nub is a good product, the concave design is desirable, but it is soft and malleable giving another variable. In the case of your setup @marine you have a concave nub on a concave bucking, not ideal. The SixG Super Nub is very hard being brass, this gives consistent hop application and concave shape to a conventional bucking (TM / Modify) A conventional bucking has a much more uniform contact patch across the width of the barrel, so the BB is centred better (due to the concave nub) and it exits the contact patch more consistently because the contact patch is essentially a straight line across the barrels width. All of these points are also true of an Rhop contact patch, the only difference being the length of the contact patch is vastly longer than a conventional bucking. All of these points are why Rhop is so effective and consistent. What I'm saying is, I think you'll get much better results with a SixG Nub and bucking