Category Archives: Jag Precision

THUMPY’S SHOT SHOW UPDATE #14-Echo 1 and JAG Precision

You know “Top Tech Brian” from Echo 1 USA’s YouTube Videos. Now, Brian Holt gives Thumpy the walk through tour of the JAG Precision booth at SHOT Show 2011, and shows off their BIG ANNOUNCEMENTS for Airsofters. You can catch ALL the videos from great Airsoft Media Folks, like the guys from AIRSOFTOLOGY, AIRSOFT PACIFIC, […]

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Bravo Airsoft High Performance Upgrade Parts Review by Booligan

JAG Precision has sent in this review of Bravo Airsoft made by Booligan of Airsoft Retreat. We assume that those who frequent Airsoft Retreat have already read this, so this is for those who do not visit that site, especially those not based in the USA. Bravo Airsoft is new company that makes high performance airsoft parts. You can read the review here as they have sent the whole transcript for us to post:


Your choice in  parts can make or break your custom gun buildup, and
parts from relatively unknown companies can be an absolute gamble.
Luckily, a new company is on the market, and has put together some
fantastic internal parts! I’ll go over a few of the new offerings from
Bravo Airsoft in this review!

Ordering/Company Info:

Bravo Airsoft is a relatively new company, largely specializing in
external parts and a single complete AEG model, a replica based on the
KAC PDW. They’ve recently started making internal components, and have
a few parts coming out in the first quarter of 2010. I was sent a few
of the new products directly from the company. Their website currently
shows a laundry list of parts, including those reviewed here, as well
as springs, wiring, AR latches, and pretty much every other part that
you could need. Pricing is competitive with most mainstream aftermarket
parts companies. Some retailers, such as ASGI, are currently carrying
these parts in their inventory, ready to go in your gun!

Basic Information:

The parts that I was sent were Bravo’s 8mm V2 gearbox shell, high speed
gears, reinforced polycarbonate piston, and a special shock absorbing
aluminum cylinder head. These parts, in my use, will be used for a high
ROF setup, but all of the parts, aside from the gears, will fair quite
well in high FPS setups as well. I’ll go over each part’s details in
their own sections later on in the review.

First impressions/Packaging:

The internal parts were all individually packaged in their own retail
packs, ready for display on store shelves. The gears, piston, and
cylinder head were all packaged in plastic with cardboard backing, like
most aftermarket parts. The gearbox shell was packaged in bubble wrap
in in a sturdy cardboard box. The packaging is pretty basic, but it
kept the parts safe in my normal hellacious shipping route, so they did
their job.

Gearbox Shell:

The gearbox shell is a version 2 design, and is thankfully devoid of
the useless reinforcement in the lower rear. It is an eye catching
piece, being Chromium 3 plated to a silver finish. Now, this coating
wasn’t just chosen for the bling factor, but for its low friction
characteristics, and sturdy finish. The gearbox comes equipped with
Japanese manufactured 8mm ball bearings preinstalled, along with a
sturdy polycarbonate selector plate, and high strength hex screws. Each
gearbox has a unique serial number stamped on the left side. The shell
is also labeled as being made in Taiwan, and a V3 will be available
soon as well.

The outer finish was pretty flawless, with an even metallic silver
finish. Inside the gearbox, I was pleased to see that there were no
major casting flaws or leftover material that would need to be removed
before use. The bearings spin freely, but are secured extremely well
inside their respective holes. The chrome plating makes the piston
rails extremely smooth and slick, helping the piston travel easily
during use.

I can’t report on the long term longetivity, but I’ve got about 2,500
rounds through it, firing at 335 FPS/28 RPS using aluminum piston and
cylinder heads with ambient temperatures at 25-35 degree Fahrenheit,
and have yet to see any ill effects.

Cylinder Head:

The cylinder head is one of the most unique pieces from what I can see.
It is made of a single piece of aluminum, and features a rubber bumper
at the front to minimize energy transfer into the gearbox shell. It has
an aggressively tapered inner surface, including the internal rubber
dampener. The rubber used in the dampeners is a good compromise between
hard and soft, with enough give to soften things out, but enough
firmness to avoid damage from being flimsy. It also features a double
o-ring seal, which, when used with the proper cylinder/piston head
setup leads to very good compression. Lastly, the cylinder head has a
great metallic orange anodized finish.

For my buildup, I installed the cylinder head inside an SRC Gen 3 type zero cylinder. I chose this for two reasons:

  1. I knew that it would help give me perfect compression using the SRC piston head.
  2. It’s anodized blue, and BSU had just won the Fiesta Bowl, so I needed to go with the orange and blue theme…

High Speed Gears:

If you have weak gears, nothing will work in your gearbox. Luckily,
these gears are strong and have a well executed multi-piece
construction. The Bravo website lists them as being "Special steel
powder tempered". They feature the Bravo Airsoft logo molded into the
sector and bevel gear, so they won't  be mistaken for another brand in
your box o' parts.

Now, my gears are their high speed units, but they also have high
torque as well as standard ratio selections coming out soon. For my
buildup, I installed them in the gearbox and shimmed them to
perfection, but I didn’t install any of the compression components. I
then ran them using a standard motor and a specially constructed 3.6v
battery for 40 minutes, in 10 minute increments. This breaks in the
gears by compressing the metal in the teeth, as well as taking out any
tiny imperfections that may not even be visible. I recommend a similar
break in procedure for ANY gears, aftermarket or not.


The piston is made of polycarbonate, and features 10 heat treated steel
teeth, along with a pre-removed 2nd tooth. The first 4 teeth are made
of polycarbonate, which is fully caged in on the sides. If you look at
a cross section of the piston, it’ll look like a raindrop with the tip
cut off, as opposed to the standard uncaged toothed design, which looks
more like a circle with the gear section just slapped on. This is a
stronger design, plain and simple, as it puts more material in the
vulnerable parts of the piston, like the first tooth. The piston rail
grooves are in three segments on each side, to allow lube to get
inside, as well as to provide less surface area with the gearbox shell
for less friction. The piston is quite light weight, but it seems
exceptionally strong.

For my buildup, I wanted to test the strength of the gearbox, so I
installed an SRC aluminum piston head. This is a very strong head with
perfect airseal using the included o-ring, but at the sacrifice of
weight. It’s heavy, and therefore transfers a lot of energy with every

My Buildup:

What good are a lot of high performance parts if you don't actually use
them in a high performance gun? For these parts, I decided to refresh
my DBoys based M4 "PDW" buildup, which had previously only seen bone
stock internals and a high speed motor/11.1v LiPo battery combo. This
had given me 30 RPS/300 FPS using those parts.

Using these parts, I saw an increase in FPS, up to 335, due to the MUCH
improved compression. I saw a slight dip in ROF, which I was expecting,
due to the higher reciprocating weight of the piston assembly.
Currently the ROF only hits 28 RPS, which I can certainly live with. I
ran into one slight snag during assembly, and that was that the DBoys
trigger axle was slightly too big for the hole in the gearbox, most
likely due to the chrome plating. 30 seconds with a dremel tool fixed
it, and led to a trigger that doesn’t fall out during assembly, which
is great!

One thing that can’t really be quantified is how much better the gun
sounds while firing now. Before, it sounded like it was running on the
razor’s edge of destruction (and it likely was), but now, it sounds
like a well oiled machine. I’ve put a few thousand rounds through the
setup now, in freezing temps, and haven’t seen any ill effects as of
yet. I opened up the gearbox and looked for signs of wear, and was
happy to see that there was none. I think that this setup should last
me quite some time, even running just shy of 30 RPS.

Here is a quick video demonstration:



  • Great build quality
  • Unique design on some parts
  • Deliver solid performance
  • They certainly are pretty…


Gearbox shell required a tiny bit of dremeling to fit my trigger (may not be an issue with all triggers)

No external reinforcement on gearbox shell (but it’s taken my abuse thus far)


I didn’t really know what to expect with these internals, but I’m
officially sold on them. They each do their job perfectly, and work
great in concert with each other. Overall, I give these guts a thumbs

Many thanks again to Bravo Airsoft and of course, AirsoftRetreat!

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