diff --git a/src/Perl6/Metamodel/AttributeContainer.nqp b/src/Perl6/Metamodel/AttributeContainer.nqp
index a2fb8ae452..0d539b5980 100644
--- a/src/Perl6/Metamodel/AttributeContainer.nqp
+++ b/src/Perl6/Metamodel/AttributeContainer.nqp
@@ -19,7 +19,7 @@ role Perl6::Metamodel::AttributeContainer {
                 "' already has an attribute named '$name'");
         }
         if $!attr_rw_by_default { $meta_attr.default_to_rw() }
-        @!attributes[+@!attributes] := $meta_attr;
+        nqp::push(@!attributes, $meta_attr);
         %!attribute_lookup{$name}   := $meta_attr;
     }
 
diff --git a/src/Perl6/Metamodel/ClassHOW.nqp b/src/Perl6/Metamodel/ClassHOW.nqp
index 5b5f61f53e..16ef37ec01 100644
--- a/src/Perl6/Metamodel/ClassHOW.nqp
+++ b/src/Perl6/Metamodel/ClassHOW.nqp
@@ -88,7 +88,7 @@ class Perl6::Metamodel::ClassHOW
         my %desc;
         %desc<cond> := $condition;
         %desc<calc> := $calculator;
-        @!fallbacks[+@!fallbacks] := %desc;
+        nqp::push(@!fallbacks, %desc);
     }
 
     sub has_method($target, $name) {
@@ -120,8 +120,8 @@ class Perl6::Metamodel::ClassHOW
             my @ins_roles;
             while @roles_to_compose {
                 my $r := @roles_to_compose.pop();
-                @!roles[+@!roles] := $r;
-                @!role_typecheck_list[+@!role_typecheck_list] := $r;
+                nqp::push(@!roles, $r);
+                nqp::push(@!role_typecheck_list, $r);
                 my $ins := $r.HOW.specialize($r, $target);
                 # If class is a result of pun then transfer hidden flag from the source role
                 if $!pun_source =:= $r {
@@ -140,9 +140,9 @@ class Perl6::Metamodel::ClassHOW
             # Add them to the typecheck list, and pull in their
             # own type check lists also.
             for @ins_roles {
-                @!role_typecheck_list[+@!role_typecheck_list] := $_;
+                nqp::push(@!role_typecheck_list, $_);
                 for $_.HOW.role_typecheck_list($_) {
-                    @!role_typecheck_list[+@!role_typecheck_list] := $_;
+                    nqp::push(@!role_typecheck_list, $_);
                 }
             }
         }
diff --git a/src/Perl6/Metamodel/ConcreteRoleHOW.nqp b/src/Perl6/Metamodel/ConcreteRoleHOW.nqp
index 7790ecdb3e..bb4664ba89 100644
--- a/src/Perl6/Metamodel/ConcreteRoleHOW.nqp
+++ b/src/Perl6/Metamodel/ConcreteRoleHOW.nqp
@@ -46,9 +46,9 @@ class Perl6::Metamodel::ConcreteRoleHOW
     }
 
     method add_collision($XXX, $colliding_name, @role_names, :$private = 0, :$multi) {
-        @!collisions[+@!collisions] := Collision.new(
+        nqp::push(@!collisions, Collision.new(
             :name($colliding_name), :roles(@role_names), :$private, :$multi
-        );
+        ));
     }
 
     method compose($target) {
@@ -56,15 +56,15 @@ class Perl6::Metamodel::ConcreteRoleHOW
 
         Perl6::Metamodel::Configuration.role_to_role_applier_type.apply($target, self.roles_to_compose($target));
         for self.roles_to_compose($target) {
-            @!role_typecheck_list[+@!role_typecheck_list] := $_;
+            nqp::push(@!role_typecheck_list, $_);
             for $_.HOW.role_typecheck_list($_) {
-                @!role_typecheck_list[+@!role_typecheck_list] := $_;
+                nqp::push(@!role_typecheck_list, $_);
             }
         }
         for @!roles {
-            @!role_typecheck_list[+@!role_typecheck_list] := $_;
+            nqp::push(@!role_typecheck_list, $_);
             for $_.HOW.role_typecheck_list($_) {
-                @!role_typecheck_list[+@!role_typecheck_list] := $_;
+                nqp::push(@!role_typecheck_list, $_);
             }
         }
         self.publish_type_cache($target);
@@ -82,7 +82,7 @@ class Perl6::Metamodel::ConcreteRoleHOW
     }
 
     method add_to_role_typecheck_list($XXX, $type) {
-        @!role_typecheck_list[+@!role_typecheck_list] := $type;
+        nqp::push(@!role_typecheck_list, $type);
     }
 
     method role_typecheck_list($XXX?) { @!role_typecheck_list }
diff --git a/src/Perl6/Metamodel/Concretization.nqp b/src/Perl6/Metamodel/Concretization.nqp
index f27a004603..451ab55ced 100644
--- a/src/Perl6/Metamodel/Concretization.nqp
+++ b/src/Perl6/Metamodel/Concretization.nqp
@@ -6,7 +6,7 @@ role Perl6::Metamodel::Concretization {
     my $lock := NQPLock.new;
 
     method add_concretization($XXX, $role, $concrete) {
-        @!concretizations[+@!concretizations] := [$role, $concrete];
+        nqp::push(@!concretizations, nqp::list($role, $concrete))
     }
 
     method concretizations($target, :$local = 0, :$transitive = 1) {
diff --git a/src/Perl6/Metamodel/EnumHOW.nqp b/src/Perl6/Metamodel/EnumHOW.nqp
index dcefa8e841..e3b4965863 100644
--- a/src/Perl6/Metamodel/EnumHOW.nqp
+++ b/src/Perl6/Metamodel/EnumHOW.nqp
@@ -62,7 +62,7 @@ class Perl6::Metamodel::EnumHOW
 
     method add_enum_value($XXX, $value) {
         %!values{nqp::unbox_s($value.key)} := $value.value;
-        @!enum_value_list[+@!enum_value_list] := $value;
+        nqp::push(@!enum_value_list, $value);
         nqp::scwbdisable();
         $!value_to_enum := NQPMu;
         nqp::scwbenable();
@@ -108,8 +108,8 @@ class Perl6::Metamodel::EnumHOW
         if @roles_to_compose {
             my @ins_roles;
             while @roles_to_compose {
-                my $r := @roles_to_compose.pop();
-                @!role_typecheck_list[+@!role_typecheck_list] := $r;
+                my $r := nqp::pop(@roles_to_compose);
+                nqp::push(@!role_typecheck_list, $r);
                 my $ins := $r.HOW.specialize($r, $target);
                 self.check-type-compat($target, $ins, [3])
                     if nqp::istype($ins.HOW, Perl6::Metamodel::LanguageRevision);
@@ -121,9 +121,9 @@ class Perl6::Metamodel::EnumHOW
             # Add them to the typecheck list, and pull in their
             # own type check lists also.
             for @ins_roles {
-                @!role_typecheck_list[+@!role_typecheck_list] := $_;
+                nqp::push(@!role_typecheck_list, $_);
                 for $_.HOW.role_typecheck_list($_) {
-                    @!role_typecheck_list[+@!role_typecheck_list] := $_;
+                    nqp::push(@!role_typecheck_list, $_);
                 }
             }
         }
diff --git a/src/Perl6/Metamodel/MethodContainer.nqp b/src/Perl6/Metamodel/MethodContainer.nqp
index 88632807d9..ae0904691d 100644
--- a/src/Perl6/Metamodel/MethodContainer.nqp
+++ b/src/Perl6/Metamodel/MethodContainer.nqp
@@ -67,8 +67,8 @@ role Perl6::Metamodel::MethodContainer {
             self.invalidate_method_caches($target);
         }
         %!cache := {};
-        @!method_order[+@!method_order] := $code_obj;
-        @!method_names[+@!method_names] := $name;
+        nqp::push(@!method_order, $code_obj);
+        nqp::push(@!method_names, $name);
     }
 
     # Gets the method hierarchy.
diff --git a/src/Perl6/Metamodel/MultiMethodContainer.nqp b/src/Perl6/Metamodel/MultiMethodContainer.nqp
index a4c32aac75..b59cc8b9df 100644
--- a/src/Perl6/Metamodel/MultiMethodContainer.nqp
+++ b/src/Perl6/Metamodel/MultiMethodContainer.nqp
@@ -28,7 +28,7 @@ role Perl6::Metamodel::MultiMethodContainer {
         }
         my $how := MultiToIncorporate.HOW.WHAT;
         my $todo := MultiToIncorporate.new( :name($name), :code(nqp::decont($code_obj)) );
-        @!multi_methods_to_incorporate[+@!multi_methods_to_incorporate] := $todo;
+        nqp::push(@!multi_methods_to_incorporate, $todo);
         %!multi_candidate_names{$name} := 1;
         $code_obj;
     }
diff --git a/src/Perl6/Metamodel/MultipleInheritance.nqp b/src/Perl6/Metamodel/MultipleInheritance.nqp
index 642501c38f..d49493f463 100644
--- a/src/Perl6/Metamodel/MultipleInheritance.nqp
+++ b/src/Perl6/Metamodel/MultipleInheritance.nqp
@@ -53,10 +53,8 @@ role Perl6::Metamodel::MultipleInheritance {
         if nqp::istype(self, Perl6::Metamodel::MROBasedMethodDispatch) {
             self.invalidate_method_caches($target);
         }
-        if $hides {
-            @!hides[+@!hides] := $parent;
-        }
-        @!parents[+@!parents] := $parent;
+        nqp::push(@!hides,   $parent) if $hides;
+        nqp::push(@!parents, $parent);
     }
 
     # Introspects the parents.
diff --git a/src/Perl6/Metamodel/ParametricRoleGroupHOW.nqp b/src/Perl6/Metamodel/ParametricRoleGroupHOW.nqp
index 5a91733b5a..c0ceb860f4 100644
--- a/src/Perl6/Metamodel/ParametricRoleGroupHOW.nqp
+++ b/src/Perl6/Metamodel/ParametricRoleGroupHOW.nqp
@@ -88,7 +88,7 @@ class Perl6::Metamodel::ParametricRoleGroupHOW
     }
 
     method add_possibility($target, $possible) {
-        @!candidates[+@!candidates] := $possible;
+        nqp::push(@!candidates, $possible);
         nqp::push(@!nonsignatured, nqp::decont($possible)) unless $possible.HOW.signatured($possible);
         $!selector.add_dispatchee($possible.HOW.body_block($possible));
         self.update_role_typecheck_list($target);
diff --git a/src/Perl6/Metamodel/RoleContainer.nqp b/src/Perl6/Metamodel/RoleContainer.nqp
index 18354d0c5f..b0d4e8846d 100644
--- a/src/Perl6/Metamodel/RoleContainer.nqp
+++ b/src/Perl6/Metamodel/RoleContainer.nqp
@@ -2,7 +2,7 @@ role Perl6::Metamodel::RoleContainer {
     has @!roles_to_compose;
 
     method add_role($XXX, $role) {
-        @!roles_to_compose[+@!roles_to_compose] := nqp::decont($role)
+        nqp::push(@!roles_to_compose, nqp::decont($role))
     }
 
     method roles_to_compose($XXX?) { @!roles_to_compose }