mightyjebus

ButcherBill · Sunday at 12:18

Not enough Sig 55X rifles in this thread.

Top - TM Sig 552 with Hurricane metal body and a Titan inside

Middle - TM Sig 553+

Bottom - GHK 552 with 3 round burst.

ruskitseller · Friday at 10:23

looks like the promised TM price increases have been announced in Japan. An MWS will cost £105 more from June. I'd imagine UK retailers will add another 50% on top of that so expect an MWS to cost around £150more when bought new.

Tackle · Thursday at 10:18

Thought this might be interesting to people using the NGRS AK74's from TM. If you snap the pot metal stock catch, you are pretty much buggered as spares are unicorn pooh. Thankfully FCW have made a steel replacement so grab one while you can.

https://www.octagonairsoft.com/product-page/fcw-steel-lock-button-for-tm-ak-next-generation-ebb-series

Enid_Puceflange · April 22

I don't think it matters too much which battery, just that it has enough juice for it to turn over the AEG. Titans are normally pretty good but I've seen a few go wrong in the past. Most 7.4v LIPO's usually show around 8v fully charged so not much difference.

Enid_Puceflange · April 22

soooo....

7.7v was probably enough for the NGRS to play up, It's not so much the voltage but more the current that the battery can supply. Fixing the semi-auto-back to semi issue can be solved 2 ways. 1. fit a high torque motor and this will stop it happening around 90% of the time. 2. fit a leviathan Mosfet and it will go away for good.

Sounds like the ambi gears are worn and allowing them to slip and get out of alignment. I can't remember if there is a screw holding the 2 parts together but if so a bit of thread lock will stop the screw working loose and allowing enough room for the selectors to slip. The gear teeth are pot metal so will wear eventually so maybe trying to source a replacement might be a good idea as it could take a while to find one.

Herrgh · April 20

it's pot metal, either snap it off with a pair. of pliers or use a dremel

April 20

37 minutes ago, Enid_Puceflange said:

Oh oh oooooh

How does it feel, looks superb 👌

It's very good. The new Mosfet makes it very snappy. Shooting around 260 on a 0.25 but the TM hop makes up for that. The quest now is to find some Mag 100 round midcaps as I don't want to use hicaps and the 40 rounder lowcap is just too low.

GothicGhost · April 20

I couldn't resist.

Galvatron · April 19

Wrong stock, pistol grip and magnifier but it's a work in progress of the new Royal Marine MCX in 300 Blackout. Based on a VFC.

Nick G · April 17

just use any lower and fill the trades in with JB weld.

mrfoxhound · April 13

Scottie will be spinning in his grave. The velocity and Mass will be applied inside or outside the barrel depending on where the BB reaches maximum acceleration. A cylinder/hop/barrel combo can only supply X amount of energy and it doesn't matter how long the inner barrel is after a point as it will add nothing extra as you can't have something for nothing.

There is a chance of a BB starting to deaccelerate inside an inner barrel due to the BB reaching maximum velocity inside the inner barrel (think of a AEG with a leaky O ring on a cylinder head). You have probably all seen an AEG that fires BB's about 10 meters due to some air leak or weak spring problem. This AEG's BB's would have started to deaccelerate well inside the inner barrel due to the velocity being low but the mass the same.

I've tried to steer clear of the Magnus effect as this is another force relative to velocity but would have a big impact on range. This hop, or rotational force, would add something to the overall momentum force at point of impact.

Tommikka · April 12

it depends on where the BB reaches maximum acceleration. If it's inside the barrel then the energy measured at the muzzle will be the maximum joules it can achieve. A heavier BB could still be accelerating as it leaves the muzzle and doesn't reach maximum velocity until xx distance (double that of a 0.2g BB). Another way to think of it is the BB has had the energy applied but it takes time (in our case distance) before the full effect takes place. Think of a rocket taking off, it doesn't go from zero to maximum right away, it slowly creeps forward and accelerates every meter it climbs until it's at full velocity. The rocket power is the same at 0 feet as it is at 1000 feet but the rocket is travelling at 2 different speeds at those 2 distances. (ignore the fact that the rocket is fighting gravity and we will be fine with this analogy).

I suspect that part of the reason for heavier BB's to travel further is that they are accelerating for longer so don't start to slow down as quickly as a lighter weight BB which reaches maximum acceleration quicker over a shorter distance, reducing the overall flight time compared to a heavier BB. Friction will affect the heavier BB more and gravity will also have some effect but it doesn't seem to be linear when comparing 0.2 and 0.4g BB's

One way to test this would be to line up a couple of chrono's and shoot some heavier weight BB's through them to see at what distance the BB peaks in joules.

mrfoxhound · April 12

There are smarter people on here than me but as far as I remember from school:

Velocity and Mass are inversely proportional, so it takes a 0.4g bb twice as long as a 0.2g bb to get to it's maximum velocity. based on a 1J AEG then somewhere along the flight time the 02.2g BB will reach maximum velocity and at double that distance the 0.4g BB will do the same.

o.2g and 0.4g BB's will have different momentum on a static object (i.e. a person) and the Mass + velocity will be transferred as momentum to the solid object. If you increase the mass or velocity then the momentum transferred will be greater.

Velocity and Mass are why you get Joules creep. If the BB hasn't fully accelerated by the time it goes through the chrono then you don't actually know the power the BB has. So more mass (0.4g BB) plus Joules creep = more momentum which translates as harder impact.

In CQB at close ranges the 0.4g BB will transfer the Mass, gained momentum and any velocity still to be used up as the BB was accelerating so you don't loose anything even if the BB hasn't got to full speed.

The momentum (impact) will vary on the static target depending on the angle that it was struck and the material is is made from (plate carrier good, exposed flesh bad).