Shooting Sports USA - July 2020 - 20

FEATURE | CMMG

CMMG's oversize ambidextrous charging
handle is included. The trigger assembly is
the well-respected Geissle Automatics SSA
two-stage.
Empty weight for the "Stormtrooper"
is 6 pounds, 3 ounces and the gun ships
with one Magpul 30-round 9mm magazine.
There's an additional internal spring and
follower assembly that allows any Magpul
AR-15 5.56mm magazine to be easily
converted to 9mm. As with all CMMG
products, the Stormtrooper is covered by its
lifetime quality guarantee.

ON THE RANGE
Taking the gun out of the box I cracked the
rifle, pulled the BCG and lubed it. I had a SIG
Romeo3 Max on a Picatinny mount that was
currently unemployed and it mounted easily.
Given the multiple games this gun can
play I wanted to test a variety of factory
loads and bullet weights. The following test
rounds were selected: Atlanta Arms Select
100-grain FMJ RN Steel Challenge; Koenig
Shooting Sports 110-grain JHP Competition;
CCI 115-grain Blazer Brass FMJ-RN; Federal
124-grain American Eagle FMJ RN; Federal
Syntech 130-grain PCC and the Federal
147-grain American FMJ-FP. I then headed to

my backyard range to zero the gun at
25 yards with the mid-weight 124 Federal
load, which I figured would get me close
enough with the other loads.
The supplied magazine was quite
interesting. It's a standard Magpul 30-round
AR-15 mag, which obviously leaves too
much space for the shorter 9mm round. That
was solved in the 9mm version by putting a
pair of 9mm-sized bumps at the rear of the
follower to provide a consistent feed surface,
and using the front area of the follower as a
feed ramp. It loaded 30 rounds easily.
My experience with AR-15 5.56mm mags
has taught me that with the bolt forward, a

PHOTO BY CHRIS CHRISTIAN

Steel Challenge Grand Master
Scott Hartford was very impressed
after running 60 rounds on Steel
Challenge targets.

20

JULY 2020 | SSUSA.ORG


https://www.ssusa.org/articles/2019/10/24/review-sig-romeo3-max http://www.SSUSA.ORG

Shooting Sports USA - July 2020

Table of Contents for the Digital Edition of Shooting Sports USA - July 2020

Contents
Shooting Sports USA - July 2020 - Cover1
Shooting Sports USA - July 2020 - 2
Shooting Sports USA - July 2020 - 3
Shooting Sports USA - July 2020 - Contents
Shooting Sports USA - July 2020 - 5
Shooting Sports USA - July 2020 - 6
Shooting Sports USA - July 2020 - 7
Shooting Sports USA - July 2020 - 8
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