Rat Impulse 03/04 Body-Gloss Black
Adrelenine AIM, 05 Trigger Frame
WAS Equalizer Board
Smart Parts Shocker Max-Flow Reg.
New Designz Slik-Shot Ram
New Designz Hammer Housing
New Designz Custom Hammer Cap
New Designz RIP Valve
New Designz LPR/ANS
New Designz Narrow Eye Cover
Smart Parts Titanium Pull Pin
Smart Parts S-Rail
Smart Parts Aluminum Hammer
Smart Parts Q-Lock Feedneck
Imperial PB Undertow Delrin Bolt
Custom Products On/Off with purge
Evil Pipe Barrel Kit
Evolution 2 Hopper (Z-Board)
Crossfire 68/4500 N2 Tank
Mac Dev LPR Gauge
Dye Sticky 3 Grips
Dwell - 7.0ms
160psi Max Flow pressure
100psi LPR/ANS pressure
1600 shots on a 68/4500 fill
Internal weight - 1010 grains
Good color selection, better marker balance, adjustability, design and construction.
Heavy trigger, very tight hand positioning. See review below.
Adrenaline has updated their AI trigger frame for the Smart Parts Impulse in 2005, renaming it the AIM frame. As of writing, it comes in black, red, purple and green anodizing.
The biggest improvement over the stock trigger frame is that the hand grip is moved about 1 inch forward to improve balance. This allows an Impulse to have better "pointability" essential for snap shooting. This change in hand grip position shifts the balance of the Impulse forward. If you use a standard style hopper (Halo/Revy) you will definitely notice the marker doesn't feel front heavy anymore.
The AIM Frame does not have a separate solenoid tray, it is integrated into the trigger frame. This reduces a little weight, and the AIM frame is 1/2 inch shorter in height compared to the stock trigger frame.
One of the strong point of the AIM frame is it's adjustability, and well thought out design and construction. The AIM frame designers have included a nylon tipped screw at the back of the hand grip to secure a 9v battery (this prevents the battery from rattling inside the trigger frame). The AIM frame has 2 screws (left/right) to provide tension to the trigger plate, to lessen side to side movement. The trigger uses a pair of high tension attracting magnets. You can now adjust the tension via a slot drilled into the hand grip. The magnet sits on top of an 1/8" allen screw, you'll need to use a bit of force at first since it is secured with red Loctite. The trigger and frame also include pre and post travel adjustment screws.
As seen on their website, the AIM frame has a peephole to ensure your microswitch engages the trigger. This is a great feature, it allows you to position the circuit board while checking to ensure you aren't damaging the microswitch during installation. The peephole has a plastic plug; I didn't use it since my grips cover over the aperature.
Adrenaline has a pretty novel approach to its trigger design. Rather than a one piece unit, the trigger has a single finger trigger plate, to which a double trigger shoe can be screwed on. This allows you to use a single trigger if you are used to actual firearms, or a double trigger for walking. The trigger shoes can also be moved forward or back before tigntening them down.
When purchasing from http://www.buypb.com/ you can add chrome on/off and dwell buttons, or select a double trigger shoe. The blade style trigger shoe comes standard.
Personally I felt the two piece trigger design is unnecessarily heavy; I wrote this article to modify the trigger:
Modifying the trigger will allow you to shoot as fast as a CP roller trigger.
If there is one complaint I have about the AIM frame...it was not designed initially for use on a stock Impulse body.
When the AIM Frame is installed you have to use their 15* ASA or the New Designz 15*ASA on a stock Impulse body. Because the trigger frame is moved forward, the stock Impulse ASA will get in the way of the trigger guard.
The trigger guard on an AIM frame actually touches the 15* ASA's on stock Impulse bodies; thus you will need to lower your grip on the regulator. HSW's I-Frame corrects this by having their trigger guard attachment on the side of the trigger frame. If you have large hands, this can be a problem, but most folks will adjust pretty quickly.
Adrenaline Impulse bodies do not have this problem since their ASA hole is moved forward to compensate; you can grip the regulator or ASA higher up.
If you wish, you can remove the trigger guard entirely! Just check with your local field in case they insist all markers have trigger guards.
Adrenaline's ASA are tapped on the left/right sides only. It looks rather odd to have your PRV (always use one...you never know when your regulator fails, sending 800psi into your Impulse) mounted on the side. Fortunately New Designz 15* ASA have front tapped PRV holes.
When viewed from the front or rear, the AIM frame has a pleasing slant to the trigger frame sides. This helps break up the slab-sided look of the stock trigger frame. You can use the stock Vision eye cover or either New Designz metal eye covers. However the plastic WAS Equalizer eye cover will bulge out slightly because of the angle of the AIM frame sides.
Purchasing the AIM frame was easy using BuyPB.com's online shopping cart. It arrived 5 days after purchasing. Their e-mail customer service department responded to my queries quickly and courteously. Good service all around!
Adrelenine has refined their Impulse trigger frames over the years. It's a great upgrade, easily found for sale at a great price. It can be even better especially if you modify the trigger for a faster response.
9 out of 10
Last edited on Saturday, April 30th, 2005 at 2:07 pm PST