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Sadlak
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Aluminum scope mount |
$146.00 |
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We manufacture the best aluminum scope mounts on
the market. They are made to the exact same precise specifications, with
every feature, as our steel and titanium models used by the military but
with such an affordable price that every sportsman can now afford one.
The new aluminum mount is made to the same rugged 3-point contact design
from 7075 heat treated aircraft aluminum. The standard finish is black
hard-coat anodize. We're not going to pretend that the aluminum mount is
built to withstand the rigors required for all uses. It is, however, the
lightweight and lower cost alternative that makes it an ideal mount for
rifles used in less demanding circumstances or seasonally, as in hunting.
As we traced the progression of M14 scope mounting solutions employed by the
military, we studied their evolution from the first U.S. Army Marksmanship
Training Unit (USAMTU) prototype for the Leatherwood ART-I scope produced in
aluminum, to the M21 ART-II scope and mount, and ending with the Brookfield
Precision Tool steel mount for the upgraded M21 and M25 military sniper
rifles.
We believe that the ART-II aluminum mount (similar to current available
mounts) failed to perform in military field conditions primarily because of
design rather than material. We have been unable to find any record of
Brookfield's superior 3-point contact design tested in aluminum as they went
straight to steel as their production material.
After making six (6) small but important improvements to the original
Brookfield design, we
did test
it in aluminum and we feel that it will not only work in civilian use, but
will fill the gap which exists between rugged heavy steel mounts in use by
the military and other current alternatives which fail to mount securely or
perform as desired.
In the past few months, we have been experimenting with a few alternative
hard coat alternatives. The photo below shows our aluminum mount with a
tungsten coating, the same coating used on our titanium scope mounts. We
continue to experiment and we will include future test models as soon as
possible. |
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our price |
Op rod
spring guide |
$38.00 |
Our National Match Spring Guide improves the consistency and smooth
motion of the operating rod which help reduce wear and increase rifle
accuracy over the standard stamped GI guide. Our NM Spring Guides are
NOT made from a cut-off stamped GI guide welded to a round drill
rod. These make-shift NM GI guides often have a soft magazine catch
caused by the welding and may not be precisely aligned because of poor
fixturing.
 Our
NM spring guides are produced to the same specifications as the
military’s national match rifles. The precision is
enhanced by making them from one-solid piece of round 8620 tool steel
with no welding to cause distortion. Each is case hardened to
40-45 HRc in an inert gas furnace to help maintain straightness
and uniform hardness for long service. They are finished with a
corrosive resistant Mil. Spec. manganese phosphate (aka Parkerized).
What makes our NM Spring Guides unique and more accurate
is our precision alignment of the magazine catch to the guide shaft.
This is achieved by turning the .344 diameter shaft from a larger
diameter solid rod. The magazine catch is then precision
CNC machined while being located from the guide shaft. Four flats are
milled into .344 shaft body to reduce weight and friction between the
spring which adds to the smooth action while precisely guiding the
operating rod.
This
product has been field tested in national matches by Dave Ferrante of Heart
Mountain Precision Machining, who is a gunsmith and distinguished high-power
competitor (email:
crookedbrookfarm@yahoo.com).
Approximately 4000 rounds have been fired from his match rifle using our
spring guide, with no appreciable wear on the catch or shaft. Mr. Ferrante
states, “It’s the finest quality guide out there.”
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The original USGI spring guide
(Fig 1) was designed with a center channel to lighten the part while
the the alternate USGI spring guide
(Fig 2) design had four oval slots in place of the channel. Both of
the designs were stamped from 1/8" metal and have a rectangular
cross-section. The original USGI spec. called for 8640, 8645, or
ASTM A506 steel which are all considered economical tool steels. For
reference, the USGI spec. for the M14 receiver was an 8620 case
hardened tool steel which is very similar to the 8640 or 8645 alloy.
These spring guides were functional and light weight, fine for a
standard issue rifle, but didn't provide any additional guidance for
the op rod. The metal, however, was hardened to 40-45 Rockwell C so
the magazine catch held up well.
| Fig 1 Original USGI Design -
23.1 grams (.81 oz) |
| Fig. 2 Alternate USGI Design
- 24.8 grams (.87 oz) |
The spring guide was meant to hold the spring in place, not guide
the op rod. When the spring and stamped metal spring guide were
installed in the op rod, there was too much "play" to maintain true
spring alignment as demonstrated in this photograph. The problem is
simple. They used a rectangular part inside the round shape of the
spring. This is why the spring, when compressed, will bunch up as
shown in the photo.
Fig 3 USGI Spring Guides Unstalled
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Recognizing the short comings of the flat stamped spring guide, the
Army redesigned the part in an effort to offer more precise spring
alignment by machining round drill rod and welding or brazing a cut
off mag catch into a slot in the drill rod. The opposite end was
tapered as it had been with the original design. Although the flat
spring guide shaft was heat treated prior to welding, it was not
re-heat treated to harden the mag catch who's metal had been softened
during the welding/brazing process. This resulted in a mag catch
which suffered excessive wear prematurely. The design was a fast and
easy way to produce a NM spring guide that was better but not long
lasting. We suspect that, early on, many NM spring guides were made
this way.
Fig 4 USGI Redesigned Spring Guide -
Weight varied depending on manufacturer. Average 59 grams to 65 grams
Fig 5 USGI Hybrid
Fig 6 TRW NM Spring Guide
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Brookfield Precision Tool
further refined the Army Marksmanship Training Unit (AMTU) redesign by
offering a spring guide with a far more accurate fully machined
magazine catch instead of a stamped catch like the GI version.
Although the machined mag catch was still welded/brazed to the shaft
as it had been on the hybrid USGI model, the entire spring guide was
heat treated after the welding which resulted in a much more durable
magazine catch. Brookfield also milled four flats into the shaft to
reduce both weight and friction and to give some room for debris in
the event dirt entered the spring area.
Fig 6 Brookfield Precision Tool Spring Guide - 63.7 grams (2.24
oz)
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The Sadlak Industries National Match
Spring Guide (Fig 7) brings the evolution of this critical
National Match quality part one step beyond the Brookfield Precision
Tool spring guide. Although our spring guide is based on the
Brookfield design with the machined mag catch, shaft, and flats, we
didn't want to take the chance that the weld operation had any adverse
effect on the finished product so we took the extra time and expense
of machining the entire spring guide from a solid round stock. This
assured perfect alignment of the mag catch with the shaft and allowed
for uniform heat treating of the whole part.
Fig 7 Sadlak National Match Spring Guide - 64.36 grams (2.26
oz)
The key to a good spring guide is the hardness and straightness - the
hardness so it won't wear too fast and the straightness so it won't
bind but will consistantly guide the op rod for maximum accuracy.
The Sadlak Industries spring guides are hardened to 40 - 45Rc which is
the USGI spec. In addition, each of our NM Spring guides is hand
inspected for straightness of .003 max. over the length of the guide.
The result of this attention to detail is a spring guide which weighs
64.36 grams (2.26 oz), has the straightness to properly align the
spring without binding (Fig 8), and the hardness to stand up to
extended use without appreciable wear.
Fig. 8 Sadlak NM Spring Guide Installed
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This
product has been field tested in national matches by Dave Ferrante of
Heart Mountain Precision Machining, who is a gunsmith and
distinguished high-power competitor (email:
crookedbrookfarm@yahoo.com).
Approximately 4000 rounds have been fired from his match rifle using
our spring guide, with no appreciable wear on the catch or shaft. Mr.
Ferrante states, “It’s the finest quality guide out there”.
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Gas
piston |
$39.00 |
GAS
CYLINDER PISTON, Titanium Nitride Coated
TiN Coated
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precision pistons are made to the exact GI specifications with all
critical dimensions individually inspected. The 420 stainless material
and heat-treating operations are both certified to assure quality. The
pistons have a highly polished surfaced using a non-contact
electro-polishing method that maintains tolerance on the critical
diameter and does not “round–over” the edges on the grooves. The
pistons are then hard coated with a gold colored Titanium Nitride (TiN)
finish. This coating, often used on machine cutting tools,
helps reduce galling and pitting and holds up better to the high heat
and abrasiveness of gunpowder and primers. The resulting effect is a
smoother action an improved life of the piston and cylinder.
National Match
Piston Alteration
NM Piston with Groove
NM groove
in the gas cylinder piston
for competition
The alteration to the pistons adds a .030/.040 wide groove running
along the piston axis on the large diameter. The groove runs
through the gas-port hole for the purpose of equalizing the gas
pressure for a smoother more consistent action. The groove is
ground to the actual GI national match drawing #9352724. The
original GI drawing for the standard piston is #7267047 which does
not specify a polished finish or the groove.
IMPORTANT: THE NATIONAL MATCH
GROOVE IS INTENDED FOR
NM GRADE AMMO ONLY AND IS NOT
RECOMMENDED FOR
SURPLUS BALL AMMO OR OTHER LOWER POWER
AMMO.
If you plan to shoot NM ammo then the groove in the piston is
useful. Otherwise, it was not intended for regular ball ammo (not
enough power). The groove provides a more consistent pressure
against the op rod by bleeding off some of the excess pressure
inherent in high-power Match ammo. This results in a slight recoil
reduction to help "get back on target" during rapids. It also breaks
the vacuum between the piston and the cylinder allowing the
shooter to hear the piston slide down to confirm it isn't fouled.
Clarification of What is National Match
The
military originally reworked standard M14 rifles into sniper rifles
using the specifications and drawings developed for national match
competition. Therefore, when first introduced, the military’s M21/M25
sniper rifles were actually their national match rifles.
Identifying an
Authentic
Sadlak Industries TiN
Coated Piston
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Tactical mag catch |
$38.00 |
The Tactical Magazine Release Latch is manufactured to original USGI
specification with the exception of the thumb pad which has been
enlarged and serrated to provide a faster, smoother release, and a more
positive grip.
The Case hardened steel has a hardness of 55 Rc and a Mil-Spec
parkerized finish
Sadlak Tactical Magazine Release Latch
Model JB1 - Part Number 140040
4mm Pin Tactical Magazine Release Latch for
Foreign Trigger Group
Part Number 140042
The vertical serrated grooves in the tab are machined in the
direction the thumb travels allowing a firm grip that results in quick
magazine changes what are helpful during the rapid portion of
competition matches and other tactical operations.
The ergonomic design of the rounded edges assure comfortable use.
Comes with Installation Instructions, a tapered alignment pin, and a
replacement Pivot Pin.
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Aluminum gas cylinder wrench |
$23.00 |
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The aluminum model is CNC machined from ½ thick aircraft quality 6061
heat-treated aluminum. The thicker material and large beveled edges provide
added comfort.
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Steel gas cylinder wrench |
$23.00 |
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The Steel model is CNC machined from 1/4 thick steel with a smaller beveled
edge. Both wrenches are designed to fit all original USGI and most
commercial gas cylinders.
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Oversized gas cylinder wrench |
$33.00 |
For foreign made
gas cylinders, we offer an over-sized version available only in ½ thk.
alum.,
olive drab color
The large hole in
the wrench is internally D-Shaped to conveniently hold the small end of
the piston from rotating during cleaning (see photos at bottom).
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Aluminum SEI gas cylinder wrench |
$33.00 |
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In an effort to give our customers what they are
telling us they need, we have developed a specialty wrench for the Smith
Enterprises M14 Gas Cylinder Lock Sight. The new wrench is a alternate model
of the Sadlak Industries Gas Cylinder Combo Wrench but with the necessary
milled flat on the jaw ID. They are available in both steel and aluminum
versions and have the same .004 mil thick coating in Olive Drab. In all
ways, they will be identical to the original wrenches except for the flat. |
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Steel SEI gas cylinder wrench |
$33.00 |
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Two gas piston drill bits |
$26.00 |
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The cleaning drill set includes a #15 (.180 dia) &
Letter ‘P’ (.323 dia.) drill for scraping the carbon deposits from the
internal bores. The drill handles are CNC machined from the same type of
6061 aluminum with a comfortable ergonomic design. |
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Gas cylinder plug drill bit |
$13.00 |
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After removing the gas plug using the Sadlak
Gas Cylinder Wrench and a USGI Combo Tool (or a 3/8 box wrench), insert the
new "O" drill into the gas plug to scrape and remove carbon deposits.
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All three drill bits |
$39.00 |
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Combo Tool |
$8.40 |
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Chase tool |
$4.30 |
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Repair tap |
$14.80 |
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3/32 Punch |
$8.00 |
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