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Store Hours
Mon-Fri: 10am-8pm
Sat-Sun: 9am*-7pm
*First hour of weekend range time (9am-10am) is reserved for
members only. Retail store is open to everyone during these hours.
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LWRC engineered a solution that retains 80% parts commonality
with the issued legacy carbine. The principal improvement comes
with the incorporation of a self regulating short stroke gas
piston system. The low mass "cup and nozzle" system
uses 100% of tapped gas pressure to overcome
the mass and resistance of the carbine's moving parts. Once the
mass and resistance is overcome, the system vents all excess
gas in a "staged
vent and dump" of residual gas.
The system is so efficient; it does this in only 6/10ths of
an inch of movement. Extraction is far more positive and consistent
shot to shot. Regardless of the loading, the piston only uses
as much force as is required to cycle the action. No more, no
less. The piston stroke is consistent even with a suppressor
in use.
Most importantly, none of the trapped gasses are channeled into
the bolt carrier group or the receiver of the weapon. That alone
eliminates the intensive cleaning regime of the legacy rifle.
It also means the bolt carrier group and associated springs are
not subject to the searing heat of the tapped gasses which can
lead to parts failure. All carbon is vented harmlessly under
the hand guards or rail system. LWRC carbines are far more reliable
regardless of user maintenance than the legacy direct impingement
carbines.
Manufacturer
(Upper/Lower): |
LWRC/Colt |
Designation (Upper/Lower): |
SRT/M16 A2 |
Country: |
U.S.A. |
Production (Colt M16): |
1956 - Present |
Cartridge: |
5.56 x 45mm NATO |
Magazine Capacity: |
20, 30 & 100 round |
Length (barrel): |
10.5" |
Rifling: |
6 groove right hand |
Cyclic Rate: |
700 rpm |
M16 Model Differences |
A1
This was the original model adopted by the military with
a 20" barrel that had the same thickness underneath
the hand guards as it did in front of the sight assembly.
The rear sight had no elevation, only windage adjustments
could be made with a 0-200 yard aperture. The aperture
could then be flipped to provide for a 300 yards and out
setting. The front sight is round in shape with 5 notches
cut into the base for zeroing the elevation, it tapers
up from the thick base to a thinner top. |
A2
The barrel remains at 20" and is now known as a Government
Contour model. It has the same diameter barrel underneath
the hand guard as the -A1 but has a thicker diameter ahead
of the front sight assembly. This change keeps the rifle
relatively lightweight but still allows the attachment
of a M203 40mm grenade launcher. The -A2's barrel also
has a new 1 in 7 twist rate instead of the older 1 in 12.
This was done in order to accommodate the new NATO SS109
type (M855) ammunition which NATO consolidated to under
STANAG 4172 (NATO Standardization Agreement). The old military
M193 round will still shoot from the M16-A2.
The rear sight now has a BDC (Bullet Drop Compensator,
also known as the Ballistic Cam) device which allows the
rifle to be zeroed with the front sight giving a battlefield
zero of 0-200 yards using the large aperture. Flipping
the aperture to peep sight then gives a 300 yard zero and
then the BDC's function takes over; it can be dialled to
4, 5, 6, 7 and 800 yards. By raising the rear sight assembly
it can compensate for trajectory at longer distances. The
front sight is square in shape with 4 notches cut into
the base for zeroing the elevation. It has no taper. |
A3
The barrel remains the same as the -A2 model but it now
has a flat top with a removable carry handle. The whole
carry handle assembly can be removed from the upper receiver
in order to expose and use a Picatinny / Weaver style rail
system for mounting optics as well as other accessories.
This allows the optics to be mounted closer to the bore
line and to maintain a good check weld. The rear sight
is also similar to the -A2 model but because of the space
needed for the new mounting system it can only be dialled
into 4, 5 and 600 yard bullet drops. The front sight is
unchanged from the previous model. |
M4
This is the newest of the military battle rifles. The
changes to the M16-A3 were significant enough to warrant
a change in the basic model number and thus this model
has been reclassified as the M4. The barrel has been shortened
to 14.5 inches but is similar to a government contour.
The thickness and length of this barrel give it the same
weight as with the original 16" lightweight Government
Carbine. The barrel underneath the hand guards is thinner
than in front of the front sight assembly, but it has a
step cut into the barrel ahead of the front sight assembly
in order to accommodate the M203 40mm grenade launcher
attachment. |
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