THE INTERCHANGEABLE MUZZLE SYSTEM (I.M.S)
The Interchangeable Muzzle System is produced so that the user can have a barrel of
16.25” Overall Length and still be able to switch various muzzle devices (from
flash suppressor to muzzle brake to a sound suppressor from Liberty
Suppressors) as desired. The various parts of the I.M.S. are made of 4140 steel that’s been heat-treated to 40 Rockwell, with a black oxide finish (the exception to this is the muzzle brake
attachment, which is made of Grade 5 titanium, with a black titanium hardcoat
finish). The brake is now available.
IMPORTANT NOTE: In light of the close tolerances required and the pressures
involved (especially with a sound suppressor), Krebs Custom STRONGLY recommends
that any customer intending to mount a sound suppressor on our IMS “base” unit
should have this “base” unit installed by a company that can insure proper
mounting, and concentricity with the bore of their rifle.
At this time, we are very pleased to recommend 2 US
companies that can perform this type of work:
CWGunwerks of Miami, FL (www.CWGunwerks.com, firstname.lastname@example.org, 786-478-6565) and M13 Industries, LLC of Las Vegas, NV (www.m13
THE IMS SYSTEM "BASE" UNIT MUST BE INSTALLED BY A GUNSMITH.
Our open 4-prong 14x1 “base” muzzle attachment is a very effective flash suppressor. The use of factory
ammunition will produce, at best, only a few sparks at the muzzle. This “base” unit can also act as a harmonic dampener when installed on a 14.5” barrel.
The total weight of this unit is 42 oz., and the overall length of the
unit is 2.9”, which means it will extend only 1.95” from the muzzle when installed.
The closed-end “birdcage” compensator suppresses flash enough
for effective low-light shooting, and holds the front of the rifle down. The total weight of this unit is 1.7 oz., and
its overall length of 2.46” means it will add only another .225” to the “base”
unit from the muzzle when installed.
The Liberty sound suppressor is custom-made for this
system. This “sealed” suppressor weighs
1 lb.,10.6 oz., should be shot “dry” ONLY, and is rated at 134-138 decibels.