Reviewer:
ANDREAS GEORGIOU
from Derynia, Ammoxostos Cyprus
The problem that I have with this is that when I had the mechanical trigger on my BT4 I could have my finger on the trigger and it was difficult to misfireNow with this thing being so sensitivy I shoot a guy in the leg by mistake.Great update though
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1 of 1 people found the following review helpful:
BT-4 Guts
September 20, 2011
Reviewer:
Landon Fleming
from Calgary, AB Canada
yes this frame will fit an A-5 the BT-4 is a cross between an A-5 and a 98/Custom. it runs an A-5 barrel adapter and lower reciever while running the 98's power tube, front bolt, hammer "Rear bolt" and endcap. Therefore if you wish you may use stocks/velocity adjusters for any custom pro/98 marker.
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2 of 4 people found the following review helpful:
bt egrip
May 30, 2010
Reviewer:
Kyle Maddux
from Hanceville, AL United States
will this grip work on a tippmann a5?
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1 of 1 people found the following review helpful:
Lets you shoot ropes
February 4, 2009
Reviewer:
Chad Hoing
from apo, AP United States
This grip takes 5 minutes to install and changed your maker dramatically. It has semi auto, ramping, and full auto modes, though you do have to open up the grip to change the modes. The only problems I have noticed is having to open the grip to change modes and that the trigger is very light. I can hit the stock on my gun and it will shoot. I have no problem with how light the tripper is, but other may decide that it is too light.
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1 of 1 people found the following review helpful:
frame
February 2, 2009
Reviewer:
Danny Mora
from Rodgers, AR United States
electronic frames are great upgrades for any gun. it has different modes and you dont get tired of shooting
BT 
BT-4 Guts