The captain Posted July 30, 2019 Posted July 30, 2019 Hi Guys, So i want to learn to tech. and i also want a DMR, so my plan is to make my Nuprol M4 into one. I know i need a MOSFET that i can programme to safe-semi-semi so i can class it as one. and i have a spring that will have be shooting at 450. but i know i have to take most of the gun apart to install this spring. So i was wondering if anyone can tell me what else is reccomended to make a DMR. Any other Tech-ing tips would be greatly appreciated.
Asomodai Posted July 30, 2019 Posted July 30, 2019 Technically you could just put a big whopping spring in it, cut down the selector plate and call it good. How long it will last would be the problem. This is what I have done for all my DMR's. Prometheus 6.03 Tightbore barrel matched to your current inner barrel length. Upgraded hop unit if possible. Flat hop tensioner and prommy purple bucking. 22TPA Neodymium motor paired with a set of 13:1 gears (Trigger response) Basic Mosfet like an Acetech. M110-M120 spring depending on your local DMR site FPS rules. New Bearings or bushings for the gearbox. Decent piston.
Supporters Rogerborg Posted July 30, 2019 Supporters Posted July 30, 2019 18 minutes ago, The captain said: I know i need a MOSFET that i can programme to safe-semi-semi Er, no. As @Asomodai says, you can cut a bit off the selector plate so that it can't engage full auto. See:
The captain Posted July 30, 2019 Author Posted July 30, 2019 48 minutes ago, Asomodai said: Technically you could just put a big whopping spring in it, cut down the selector plate and call it good. How long it will last would be the problem. This is what I have done for all my DMR's. Prometheus 6.03 Tightbore barrel matched to your current inner barrel length. Upgraded hop unit if possible. Flat hop tensioner and prommy purple bucking. 22TPA Neodymium motor paired with a set of 13:1 gears (Trigger response) Basic Mosfet like an Acetech. M110-M120 spring depending on your local DMR site FPS rules. New Bearings or bushings for the gearbox. Decent piston. Okay, what dictates if upgrading the hop is possible ? also when you say upgraded hop unit do you mean a nub and a bucking ? or the actual cogs and the rest ? and cutting down the selector plate required opening the gear box, ive never done that before, dont want to break the gun before im finished converting it. I have the spring already. and what is a "Flat hop tensioner". The prommy purple bucking says for fps under 400. Sorry i got loads of questions man, im new to opening these beauties up and changing stuff, i have seen so many videos on how to actually do it, but i dont really know about parts and whats better for what job and why.
Supporters Lozart Posted July 30, 2019 Supporters Posted July 30, 2019 40 minutes ago, The captain said: Okay, what dictates if upgrading the hop is possible ? also when you say upgraded hop unit do you mean a nub and a bucking ? or the actual cogs and the rest ? and cutting down the selector plate required opening the gear box, ive never done that before, dont want to break the gun before im finished converting it. I have the spring already. and what is a "Flat hop tensioner". The prommy purple bucking says for fps under 400. Sorry i got loads of questions man, im new to opening these beauties up and changing stuff, i have seen so many videos on how to actually do it, but i dont really know about parts and whats better for what job and why. Go read this: If you're still set on going DMR you will have to open the gearbox regardless.
The captain Posted July 31, 2019 Author Posted July 31, 2019 On 30/07/2019 at 15:52, Asomodai said: Technically you could just put a big whopping spring in it, cut down the selector plate and call it good. How long it will last would be the problem. This is what I have done for all my DMR's. Prometheus 6.03 Tightbore barrel matched to your current inner barrel length. Upgraded hop unit if possible. Flat hop tensioner and prommy purple bucking. 22TPA Neodymium motor paired with a set of 13:1 gears (Trigger response) Basic Mosfet like an Acetech. M110-M120 spring depending on your local DMR site FPS rules. New Bearings or bushings for the gearbox. Decent piston. Out of Curiosity, just how long would it last ? if i just get a new spring, nub, bucking, motor, barrel, and use a mosfet to lock to semi. No new Piston or gears or bushings. Are we talking a few thousand less shots before it gives out ? or are we talking itll fall apart in 500 shots ? also what is likely to go first when putting in a bigger spring ? im assuming the piston ?
Asomodai Posted July 31, 2019 Posted July 31, 2019 18 minutes ago, The captain said: Out of Curiosity, just how long would it last ? if i just get a new spring, nub, bucking, motor, barrel, and use a mosfet to lock to semi. No new Piston or gears or bushings. Are we talking a few thousand less shots before it gives out ? or are we talking itll fall apart in 500 shots ? also what is likely to go first when putting in a bigger spring ? im assuming the piston ? How long is a peice of string? It depends how each part manufactured was QCed at the factory if at all. All the stock stuff in cheap rifles like yours are built to a low cost to perform well enough for the stock FPS. The more you spend the less chance of it it being a lemon. Just get it all done at once so you dont have to take it apart for a long time. First thing to go is likely Piston, though I have broken more gears then pistons due to poor shimming. If you are going to replace the spring you have to take apart the gearbox anyway.
Moderators Tackle Posted July 31, 2019 Moderators Posted July 31, 2019 I would so say to get yourself a chrono, if your tinkering & trying to get to a particular fps you don't want to have to arrive on site & rely on their chrono, you might get turned away ?. its prob the next thing on my shopping list, got a load of fettling to get on with, once I can hold my tools lol ?
Wo1f Posted July 31, 2019 Posted July 31, 2019 I’d be lost without a chrono. Best £50 I’ve spent in airsoft.
Supporters Adolf Hamster Posted July 31, 2019 Supporters Posted July 31, 2019 10 minutes ago, Wo1f said: I’d be lost without a chrono. Best £50 I’ve spent in airsoft. agreed, very useful, especially when mis-advertised springs are a thing.
The captain Posted August 1, 2019 Author Posted August 1, 2019 @Adolf Hamster@Wo1f@Tackle I Have just ordered one, based on you guys's suggestion. thanks 18 hours ago, Asomodai said: How long is a peice of string? It depends how each part manufactured was QCed at the factory if at all. All the stock stuff in cheap rifles like yours are built to a low cost to perform well enough for the stock FPS. The more you spend the less chance of it it being a lemon. Just get it all done at once so you dont have to take it apart for a long time. First thing to go is likely Piston, though I have broken more gears then pistons due to poor shimming. If you are going to replace the spring you have to take apart the gearbox anyway. Surely all gearboxes are shimmed well by default ??? Do you only worry about shimming if you change somehting ? or is it good to get in there and do it to any gun you have ??
Asomodai Posted August 1, 2019 Posted August 1, 2019 23 minutes ago, The captain said: @Adolf Hamster@Wo1f@Tackle I Have just ordered one, based on you guys's suggestion. thanks Surely all gearboxes are shimmed well by default ??? Do you only worry about shimming if you change somehting ? or is it good to get in there and do it to any gun you have ?? Wishful thinking I am afraid. Hardly any gearboxes have been shimmed properly or the AOE corrected from factory.
E21A Posted August 1, 2019 Posted August 1, 2019 30 minutes ago, The captain said: Surely all gearboxes are shimmed well by default ??? On 30/07/2019 at 15:46, The captain said: my Nuprol M4 Lol
Wo1f Posted August 1, 2019 Posted August 1, 2019 You’ll be lucky to get a gun that’s shimmed well, never mind perfectly from the factory. Some manufacturers are better than others, but every company has their lemons and perfect guns.
The captain Posted August 1, 2019 Author Posted August 1, 2019 damn, i guess ill need to shim it then. didnt realise they wouldnt come already done, seems like something that should be done. Any to do this the first time ??
Supporters Lozart Posted August 1, 2019 Supporters Posted August 1, 2019 1 hour ago, The captain said: damn, i guess ill need to shim it then. didnt realise they wouldnt come already done, seems like something that should be done. Any to do this the first time ?? It will be shimmed, just not well.
Supporters Rogerborg Posted August 1, 2019 Supporters Posted August 1, 2019 3 hours ago, The captain said: damn, i guess ill need to shim it then. Well, maybe. My £75 CYMA M4 was spot on, although I accept that was just down to luck rather than any sort of diligence at the factory. If you're in there doing the spring anyway then you might as well clean out the China snot grease and do the shimming. A pack of assorted shims is only a few £££ and all it needs is following one of the many video tutorials and some patience.
Musica Posted August 1, 2019 Posted August 1, 2019 53 minutes ago, Rogerborg said: Well, maybe. My £75 CYMA M4 was spot on, although I accept that was just down to luck rather than any sort of diligence at the factory. If you're in there doing the spring anyway then you might as well clean out the China snot grease and do the shimming. A pack of assorted shims is only a few £££ and all it needs is following one of the many video tutorials and some patience. a broken clock is right twice a day.
Supporters Rogerborg Posted August 1, 2019 Supporters Posted August 1, 2019 31 minutes ago, Musica said: a broken clock is right twice a day. Lies, I'm rarely right more than twice a week.
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