Hunting, long range plinking, &
Silhouette Competition with an American Made & Modified Air pistol? Yes, try it with a MAC1 LD pistol.
Some pistols have the necessary accuracy. Some have the knockdown power. But
none of them has these two in the potent combination that the LD MKI offers. Don't believe us - try it! It is
the only Airpistol with a satisfaction guarantee or your money back.
And...silhouette is not the only
shooting sport where the Mac1 LD MKI shines. When we tell
you that they often shoot 1" groups from a bench at 50 yards, you'll begin
to get the idea.
With the LD's 200-250 shots on a 4
oz. CO2 tank and superb consistency, the gun is ready for most anything. Throw
a Red Dot on and make it a serious practice gun for Conventional Pistol, indoors or out under circumstances when
practicing with rimfires isn't possible. Or go for a big RIFLE scope and how
about field target shooting? A pistol
that can group as tight as the LD
at 50 yards can take on RIFLES! All it takes is the right scope and your
willingness to test pellets and keep a detailed shooting log until you know the
Sure, you'll see the LD MKI really shine when you
take it out to fire an Airpistol Silhouette match, but we just want to
emphasize that it can do a lot more - like tin cans at 80yds, medium range pest
control, and just plain fun shooting with rifle-like accuracy! I doubt that
there's another air or gas pistol in
existence that has shattered the familiar limitations of air and gas pistols
like the LD. It is a
staple of every pest controller we see and has been put to the test hunting by
a lot more shooters than competitors for sure. We’ve built over 1000 LD’s now
and I suspect 90% are used for hunting and pesting.
begins with a standard Crosman MK1 or MKII, which has to be the finest budget
CO2 pistol of all
A re-contoured bolt probe
facilitates airflow with minimal resistance. A re-machined valve body
eliminates CO2 loss between frame and valve body and utilizes a higher capacity
chamber and larger valve seat to flow more CO2 with shorter valve duration.
The frame is machined to allow
fitting of standard 3/8" dovetail rings for scope mounting. And the
dovetails are cut at a 25-minute downward angle, to allow trouble free sight-in
at very long and/or short ranges with the scope working in the middle of its
The original barrel housing has been
re-machined to accept the LW(Lothar Walther) manufactured barrel. This is the
simplest, most rigid, and most precise way of fitting a barrel, and it insures
that every LD will
shoot well. Larry Durham designed the barrel and hangy tank concept to be one
of the best AG's of all time. After producing over 1000 LD MKI pistols in the last 27 years it
represents one of our proudest achievements and continues to be the Airpistol
to beat in competition.
A bulk adapter is fitted to
facilitate the hanging of a 4 oz CO2 tank from the bottom of the pistol grip. This makes the
center of gravity of the pistol very
low, giving extraordinary stability, especially with a scope! The advantage, is
stable velocity from shot-to-shot over hundreds of shots, and you NEVER have to
run low, or shoot the gun until its empty to refill it, you simply remove the
tank before power falls off and replace it with a full one to continue shooting
at the SAME velocity! The bulk adapters have a check valve so that when the
tank is removed, the gun stays charged. This permits swapping tanks on the fly,
as well as storing it charged, which is also desirable. In addition, use of the
conventional piercing cap, permitting the use of disposable 12 gram cartridges
as an alternative power source is still an option.
The metal surface is bead blasted
then an Auto finish flat black paint is baked on for a durable finish.
This is a "Custom," gun,
and that's exactly what we mean - so if there is something else you'd like to
see on a custom CO2 pistol before you
part with your hard-earned cash? Get in touch with us and we'll talk - if it's
feasible, we'll do it for you!
Some LD History
I've been tinkering with airguns for
a lot of years, always searching for ways to maximize the potential of
production guns. As soon as I saw the first MK1, I realized this could be a
great custom airgun. With an awesome trigger and great ergonomics, its
vapor-only layout was consistent and efficient. The factory barrels were good,
but we knew we needed longer ones to get the power and balance we wanted. Bill
DeHaven designed our first long-barrel conversions, using barrel liners that
were machined from .22 Hornet or .223 firearm barrels. The factory barrel
housing was machined and an extension added for this mod. Then the whole thing
was sandwiched together and held by threads on the barrel ends just as a
stocker is done but with the sleeve added for length. Bill was a Guy who liked
doing one-offs, so he told me to go ahead and build his design. I can't blame
him because they were a nightmare to get aligned with the sights.
I had purchased the last 150 MK1's
from Crosman and developed a high-power valve to complement the long barrel. I
used my three-angle valve seat and a second o-ring groove in the valve body to
eliminate leakage between the valve and the frame. It got a few shots less per
CO2, like maybe 15%, but it shot over 10% faster and 20% harder and was way
more consistent throughout the charge.
The first LD was sketched out on an In-N-Out Burger
napkin by Larry Durham, who had commissioned me to do a long barrel to HIS
liking. The most significant difference from the previous iteration of the
long-barrel MK1 was that the housing was machined to accept a bull-barrel
configuration rather than the BD's skinny, turned down barrel and outer-sleeve
construction. It was so much better that I was upset I had not thought of it.
From a set-up standpoint the guns became a breeze to sight in and actually
pointed the scope directly to the impact point. The design expertise of a
production engineer with 30 years experience made the gun several times as
accurate with one little but significant alteration to the design. We moved
away from the firearm barrels, which would only shoot oversize pellets like
5.6mm Wasps, and started building the guns with Lothar/Walther barrels. The
Failed Sheridan Sterling project gave us access to Lothar/Walthers at a great price
so we used those until they ran dry. I ended up making a deal with HW to build
us our barrels exactly to our specifications, already blued and ready to
hand-crown and bolt up. We used those for over a dozen years and HW probably
made 600-700 total. We are now back to using Lothar Walthers and they are
available in 12” or 10” normally and
long 14 & 17” barrels can be special ordered.
The bull barrel is an impressive
eyeful and engineering brilliance in its simplicity, but the most remarkable
feature of the LD is
one you can't see - the way it handles the CO2 that powers it. The quirks and
kinks of CO2 are something I know better than anyone in the airgun business.
What has been done with the valving on the LD
is simply incredible. Temperature is the big joker with CO2 in a gun - most
airgun designs using CO2 have stumbled over the fact that the pressure in a CO2
reservoir rises and falls sharply in response to the ambient temperature. The
valve I use has been the same for a few years now and represents our commitment
to excellence. Crosman made the exhaust valve I used for decades but when they
discontinued the part we took up the manufacturing ourselves. I haven't changed
a thing on it in several years, as I feel I have found the ultimate setup.
Performance is essentially consistent from 45-65 F at around 500 FPS. At 85F it
climbs to 560 FPS, and then as the valve sees increased pressure due to
increased temp it once again approaches 500 FPS as it approaches 110F.
The pressure at 45F is 600 PSI. At
65F pressure is 750 PSI. At 85F PSI is 1000 and at 95F PSI is 1250. In a range
of pressure that more than doubles, velocity rises and then falls less than 10%
due to clever valve design. Valve duration is balanced w/ pressure by passing
low volumes of high pressure or high volumes of low pressure to yield a nearly
flat performance across the pressure spectrum."
The most incredible difference in
shootability came about with the development of the hangy tank. LD was convinced if you
lowered the CG (center of gravity) of the pistol
the shooter would be more accurate. His theory was a SCOPED gun should be
absolutely neutral in your hand (you can hold the gun up with one finger in
trigger guard). It shouldn't be muzzle heavy or light or top heavy. With the
tank he hung from the bottom of the grip it was cheating. Larry made the first
ones and I remember trying to get him to let me use it all the time. We evolved
a design so you could screw a paintball tank into the bulk adapter which had a
LD gets full credit for pioneering this technology as well as
the barrel design. He has been instrumental in helping me to improve the
product over the 22 years we have built it. He has a number of trophies from
State and National championships earned with the LD
MKI and has been very supportive of the project from the beginning. He's a
great pistol shot
and Master Silhouette shooter. He has beaten high dollar EURO Olympic equipment
is the product of years of hands-on experimentation at Mac1 and constant input from shooters who have
put Mac1's custom work to the test in field conditions and on the competition
range. I'm very proud of this project and like to mention how many happy
customers I have who are using these guns for target and hunting applications.
Numerous championships have been won with this pistol over the years. I'm so confident that I
offer a money-back Guarantee and they don't get sent back!
Want It? You can't go buy a NEW
Crosman MKI to use as a basis for my custom anymore, but good used ones are out
there if you look hard. You'll even find some great deals. They haven't been
made since 1980 as far as I know. We make these guns up from used ones, and we
give you the best hardware we have but it IS used, so cosmetics can vary. We
basically give you back one as clean as you give us and we use the hardware off
the gun you send. We are getting short on some parts, so an incomplete, buggered
up gun will cause problems. We call them roaches and there is a roach fee if it
causes extra work. If you want a really clean one find yourself a real nice
example and send it to us. A leaking gun is not a problem, as all internals
will be reworked. Mac1 owns over 175 MKI pistols as we have been buying them
for years. If you can’t find a clean one we can supply one of the shop guns to
build your LD from.
Dry Weight with tank fitted - 61
Length – 15 1/2" w/ standard 12" Mac Match barrel (add 3 1/4 "
for three baffle brake). Optional barrels are 10", 14" & 17”
Power - LD MKI
Shoots between 450-560 FPS w/ 13.9 grain pellets on power adjustable models.
Non-adjustable versions do 560 FPS or can be set from 450-550 FPS if you
Trigger - Two stage w/ 8oz First stage and 16oz Second stage.
Sights - Windage and Elevation adjustable rear sight.
All Standard LD
MkI's are .22 caliber.
Limited Edition LD’s can be had in
.20 or .22 caliber.
All LD barrels in .20 and .22 use
the same bolt so they can be interchanged between guns no problem. Regardless
of caliber designation or length the alternate barrels will still fit. We do
not offer .177 caliber LD’s.