[silentball]

Yeah, now the only weak link is in the cheep metal of the cylinder. Both my M28's had bad cylinders, and were replaced with original Echo1 units I found on eBay. The stress of the heavier springs will take its toll on the pressed fittings for the bolt lever. I'm not looking to steal ~Ranger~'s thunder on his pistons, they are PERFECT replacements. Now if we can get him to make the cylinder in stainless steel, I'd be the first to order a pair of them.

I used CA or superglue on the pressed in bolt handle stud. I placed drops of glue along the seam all around. It quickly seeped into the gaps and bonded the the two pieces together. Not a single movement. It works, try it.

Make sure you take the piston out first.

 

[silentball]

The 90 degree trigger is not really needed for the stock M28 out of the box. Slam firing is from the loose fitting pot metal 45 deg sear set that comes with the M28. If you look at dragon64's video, mine was not as bad as his, but getting there.

Mine is so sloppy, you can even push the sear down even without pulling the trigger. The 2nd sear side slop chews up the piston over time, as you recock and fire because the 2nd sear never engages straight so that the edges of the 2nd sear start to bit into piston catch.

I have a old TM VSR10 which is using the same trigger group as a M28. Apparently only the M28 trigger group is VSR10 compatible.

The TM VSR10 also uses a plastic piston, and that has shot thousands of shots through it and no slam fire. Why? The 45 deg sear in it has no slop so it does no tear up the piston. (A new E1 M28 sear set won't solve your problem because it is sloppy new)

I have been using a real TM VSR10 trigger assembly in my M28 now for a year, and .... no slam fire. But no one sells the real TM VSR10 trigger assembly or the parts.

My suggestion is to replace the sear group with something better. I am waiting on this sear to drop in. http://arniesairsoft.co.uk/news2/47549 It is the only one I know of that has a curve 2nd sear surface to it does not chew up a plastic piston and robust looking. Best of all, it is not pot metal like the stock ones.

The M28 is great value for the money, considering it is low cost and includes a suppressor adaptor, two magazines and bipod! The sear issue is easily fixed because aftermarket stuff is finally coming.

Also consider the Ranger's new M28 piston that will be available as well. http://airsoftsniperforum.com/showthread.php?t=4951

I am sure Ranger is working on other stuff in secrecy.

 

[silentball]

You are correct, for the stock configuration of the M28, the 90 degree trigger is over kill. These products are for the upgrade hungry players that require them for high performance builds.

My friend's JG Bar10 is using a M170 spring with a 90 deg sear and piston set but his range and accuracy is no better than my stock E1 M28 with a M120 in it. I can still hit a man size target easily at 250 to 280 ft with very little effort pulling the bolt back on my M120.

He has to struggle every time he pulls the bolt with the M170.

 

[silentball]

The hop up unit issues is with the cast metal pin that the hop up lever pivots on.

Dragon, if you take a caliper you will find that the left side of the lever pin has a larger diameter than the right side. This is because the left side of the hop up unit needs to release from the mold and if the hop up lever point was completely parallel, it will bind coming out of the mold.

Mathematically you can calculated the exact angle of of hop up lever tilt from the measurements.

Thus the hop up lever will be canted a few degrees to the left, cause more hop on the left side of the buck, and a result shots hook to the left.

Solution - get a CNC hop up unit that using a real steel pin

 

[silentball]

You certainly lucked out . Mine was not uniform. These things are cheap so I may buy another one or go to the store with the calipers and pick a good one.

 

[silentball]

Great idea with the 35mm film cans. Hope you have a supply for us because I have gone digital a long time ago and haven't touched a roll of 35mm since.

 

[silentball]

New product from Dragon64. 35mm cylinder sleeve kits coming soon....

 

[silentball]

Make sure there is a return if it does not work. Those asgi pistons are made off shore for clone VSR10 cylinders, not M28. There was a confusion when the M28 was released was supposed to be 100% VSR but now we find out only the trigger is and that is also off spec.

 

[silentball]

Looks like Evike has a piston for the M28 but it also will work on a VSR10.

http://www.evike.com/product_info.p...35610&osCsid=5d5b61b3c1fadbbe508ccd29a04369d5

 

[silentball]

My friend just tried fitting a JG Bar10 trigger which is VSR10 compatible into his M28 last night and only to find it does not work. Somehow the Bar10 is larger than the M28 and also the safety now does not engage either.

He does have a JG Bar10 and it has Laylax VSR10 upgrades in it with no problems.

The M28 trigger group is way off spec and VSR10 triggers may not even fit and requires modification. It will be a hit and miss thing with these M28 sears using VSR10 stuff like Laylax, AA and PDI.

 

[silentball]

I am sure the Bar10 trigger box can bolt onto the M28 receiver.

But I think the issue is the internal parts loose tolerance.

Since you have a Bar10 trigger box, can you please try testing the M28 sear in the Bar10 trigger box with the Bar10 trigger.

Then test the Bar10 trigger in the M28 trigger box with the M28 sear.

Thanks

 

[silentball]

My friend was up all night with another friend that has a real TM VSR10 and was able to confirm the following.

The M28 trigger box is proprietary or it is out of spec!

- The Bar10 trigger works perfectly in a TM VSR10 trigger box but would bind in the M28 trigger box and prevents the safety from working.

- The M28 sear also binds in the TM trigger box

- When the M28 trigger was used in the TM trigger box, the TM would slam fire.

What he has concluded is that a complete trigger box either from TM or JG will bolt up onto the M28 receiver.


DO NOT mix up the internal parts. The Echo1 M28 trigger box is proprietary.

 

[silentball]

I guess the test with real TM VSR10 parts was the best way to confirm if the M28 trigger box was really 100% VSR10 compatible .

It looks like a hit and miss.

He has gone ahead to order a complete JG Bar10 trigger assembly from either Evike or ASGI.

My M28 trigger box does not work with the a Bar10 trigger either. I will be switching out to a Bar10 trigger box as well.

Ranger, You just confimed that even the plastic parts don't even have consistent dimensions. If the piston was severely undersized, it will slam fire easily along with the loose fitting M28 trigger parts.

 

[silentball]

SPEED M28 sear group

Just found this one that Brian at E1 just posted.

M28 cnc aluminum sear set for Echo1 - YouTube