Post by SANDMAN on Jun 14, 2005 23:55:50 GMT 8
Here's my project for the day. Hope you guys enjoy it.[/color]
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Alam nyo naman na sabog ang accuracy ng AKS-74u diba? Check out The reviews here:acmgames.proboards40.com/index.cgi?board=review&action=display&thread=1117279202&page=1
Kaya, eto na lang ginawa ko: replaced the barrel with a barrel from my busted WELL D90 ACM(FN-P90).
The picture on top is for scale. Check out the picture below for the close-up.
The original barrel is the one above the gun. Take note that the inner aluminum barrel is rather short and that the plastic barrel extension is rather loose(malaki ang inner diameter). I guess the BBs would hang-up between the junction of the aluminum and plastic barrels and wobble all the way to the target.
I had already installed the Well D90 barrel in the gun when the picture was taken and the lenght was just right. When the flash hider is installed- the aluminum barrel is completely hidden from view and protected from damage.
Take note that the D90 barrel has two "air vents" 1/3 of the way down the barrel. It needs these holes 'coz of the low air volume of our ACM piston/cylinders. If the barrel was full-lenght(without the holes), there would be a vacum behind the BB even before it left the barrel and the BB would either slow down considerably or stop entirely!
Nagkamali nga ako nung first try ko kasi binaliktad ko yung pagkabit ng D90 barrel. I installed it with the air holes 1/3 of the way from the END of the MUZZLE. Since that arrangement made the barrel "longger" than the stock barrel- bumagal ang bato ng mga BBs. Ooops... bukas uli agad ng AK para baliktarin- this time with the holes closer to the gearbox.
Results:
ACCURACY- Before: Only 50% of the BBs fired would hit a man-sized target 25ft downrange! Not only would the other 50% miss, but they would MISS REALLY WIDE!!! My favorite accuracy target is a tree with palm-sized leaves. My M83 can empty an entire magazine into a tennis ball sized group @ 12ft. But only 75% of the AK's shots will enter the leaf at the same range!
After: 100% of the BBs fired could now hit the man-sized target at 25ft. My M83 is still a bit more accurate in the "leaf test" but at least all of the AK's shots hit the leaf this time.
Hop Up Performance: Before - I had to crank the HOP-UP to it's FULL setting to get any kind of "lift" from the BBs. But performance was so bad- I thought the HOP-UP was busted. Halos pareho ang performance kung ON or OFF ang HOP-UP eh... shucks! Kumakabig pa minsan ang BBs to the left.
After - Wow...kung naka FULL HOP UP ako- umaakyat na BBs ko at the end of it's trajectory before it drops softly to the ground! Yan ang HOP UP! I had to reduce the hop-up setting to it's MID positon to be able to get a decently straight trajectory.
Power I'd say an increase in 10-15% in Muzzle velocity was achieved. Though I have no scientific tests to back this aside from what I can observe with the flight of the BBs. ROMMEL who also shot himself with this AKS before I modded it also shot himself after the mod- and he says that it stung more this time around. I wish I had done extensive penetration testing BEFORE and AFTER the modification though.
Will BATTLE TEST this configuration later this weekend and I'll give you guys feedback if the mod survives the torture test.
Next up-- Cosmetic mods: Painting, and probably even "pistolizing". Walay X-TRA power mods in line for this baby kay pang URBAN CQB nako ni sya.
====
Alam nyo naman na sabog ang accuracy ng AKS-74u diba? Check out The reviews here:acmgames.proboards40.com/index.cgi?board=review&action=display&thread=1117279202&page=1
Kaya, eto na lang ginawa ko: replaced the barrel with a barrel from my busted WELL D90 ACM(FN-P90).
The picture on top is for scale. Check out the picture below for the close-up.
The original barrel is the one above the gun. Take note that the inner aluminum barrel is rather short and that the plastic barrel extension is rather loose(malaki ang inner diameter). I guess the BBs would hang-up between the junction of the aluminum and plastic barrels and wobble all the way to the target.
I had already installed the Well D90 barrel in the gun when the picture was taken and the lenght was just right. When the flash hider is installed- the aluminum barrel is completely hidden from view and protected from damage.
Take note that the D90 barrel has two "air vents" 1/3 of the way down the barrel. It needs these holes 'coz of the low air volume of our ACM piston/cylinders. If the barrel was full-lenght(without the holes), there would be a vacum behind the BB even before it left the barrel and the BB would either slow down considerably or stop entirely!
Nagkamali nga ako nung first try ko kasi binaliktad ko yung pagkabit ng D90 barrel. I installed it with the air holes 1/3 of the way from the END of the MUZZLE. Since that arrangement made the barrel "longger" than the stock barrel- bumagal ang bato ng mga BBs. Ooops... bukas uli agad ng AK para baliktarin- this time with the holes closer to the gearbox.
Results:
ACCURACY- Before: Only 50% of the BBs fired would hit a man-sized target 25ft downrange! Not only would the other 50% miss, but they would MISS REALLY WIDE!!! My favorite accuracy target is a tree with palm-sized leaves. My M83 can empty an entire magazine into a tennis ball sized group @ 12ft. But only 75% of the AK's shots will enter the leaf at the same range!
After: 100% of the BBs fired could now hit the man-sized target at 25ft. My M83 is still a bit more accurate in the "leaf test" but at least all of the AK's shots hit the leaf this time.
Hop Up Performance: Before - I had to crank the HOP-UP to it's FULL setting to get any kind of "lift" from the BBs. But performance was so bad- I thought the HOP-UP was busted. Halos pareho ang performance kung ON or OFF ang HOP-UP eh... shucks! Kumakabig pa minsan ang BBs to the left.
After - Wow...kung naka FULL HOP UP ako- umaakyat na BBs ko at the end of it's trajectory before it drops softly to the ground! Yan ang HOP UP! I had to reduce the hop-up setting to it's MID positon to be able to get a decently straight trajectory.
Power I'd say an increase in 10-15% in Muzzle velocity was achieved. Though I have no scientific tests to back this aside from what I can observe with the flight of the BBs. ROMMEL who also shot himself with this AKS before I modded it also shot himself after the mod- and he says that it stung more this time around. I wish I had done extensive penetration testing BEFORE and AFTER the modification though.
Will BATTLE TEST this configuration later this weekend and I'll give you guys feedback if the mod survives the torture test.
Next up-- Cosmetic mods: Painting, and probably even "pistolizing". Walay X-TRA power mods in line for this baby kay pang URBAN CQB nako ni sya.