Manual

25
Screw in Chokes Symbols/Markings
The end of the choke tubes are marked with slashes to identify the choke
constriction:
/ - Full
// - Improved Modified
/// - Modified
//// - Improved Cylinder
Cl - Cylinder
WARNING!
MAKE SURE YOU FULLY TIGHTEN THE CHOKE TUBE
Shooting with a loose choke tube can cause damage to your semi-auto
shotgun.
Additional information on screw choke tubes:
A) Only tighten or loosen choke tubes with flat key wrench supplied with semi-
auto shotgun. Note: wrench (and extra choke tube or tubes if supplied) are
under the cardboard in front of the semi-auto shotgun receiver in the box.
B) Never shoot the semi-auto shotgun with a partially installed choke tube.
C) MP153 semi-auto shotguns are available with fixed choke or screw choke
barrels. There are two types of screw chokes available: lead shot choke
tubes and steel shot choke tubes. When installed, steel shot choke tubes
protrude approximately 3/4” from the muzzle end of the barrel and the mating
lip will be flush with the end of the barrel. When installed, lead shot choke
tubes fit flush with or slightly below the muzzle end of the barrel. If you have
lead shot choke tubes and intend to shoot steel shot cartridges or slugs,
then you must use only the IC or Cylinder tubes. If you have steel shot
choke tubes, you may fire steel shot cartridges through any of those choke
tubes. DO NOT fire slugs in Modified, Improved Modified or Full lead shot
choke tubes or steel shot choke tubes.
D) Correctly install choke tubes. Lead shot choke tubes should fit flush or slightly
below the muzzle end of the barrel. Steel shot choke tubes will protrude out
from the barrel about 3/4” and the mating lip will be flush with barrel end.
E) Before using the semi-auto shotgun make sure that the choke tubes are
installed correctly.
F) Keep choke tubes lubricated and installed. Never fire the gun without a choke
tube installed. Handle choke tubes carefully since the leading edge is very
thin.