|-
| '''Ported barrel''' || [[Recoil]] -1<br/>[[Weapon accessories#Silencers|Silencers]] are rendered ineffective || || '''450''' || See [[Maze Customs:Major mods#Notes|note 1]]
|}
'''Barrel threading type'''
{| class="wikitable sortable" style="font-size:9pt"
|-
! Configuration name !! Effects !! Corresponding base models !! Cost ([[File:Parallar symbol.png|10px]]) !! Description
|-
| '''No threading''' || Muzzle: None || [[Colt Delta Elite]]<br/>[[Colt M1911A1]]<br/>[[SIG 1911FN]]<br/>[[Springfield 1911RO]] || '''50''' || Original barrel profile with no threading.
|-
| '''Standard threading''' || Muzzle: Standard devices || || '''150''' || Modern muzzle threading system for mounting Standard muzzle devices.
|}
|-
| '''Ported barrel''' || [[Recoil]] -1<br/>[[Weapon accessories#Silencers|Silencers]] are rendered ineffective || || '''450''' || See [[Maze Customs:Major mods#Notes|note 1]]
|}
'''Barrel threading type'''
{| class="wikitable sortable" style="font-size:9pt"
|-
! Configuration name !! Effects !! Corresponding base models !! Cost ([[File:Parallar symbol.png|10px]]) !! Description
|-
| '''No threading''' || Muzzle: None || [[Para P-14]]<br/>[[Para P-16]]<br/>[[Para P-18]] || '''50''' || Original barrel profile with no threading.
|-
| '''Standard threading''' || Muzzle: Standard devices || || '''150''' || Modern muzzle threading system for mounting Standard muzzle devices.
|}
|-
| '''Ported barrel''' || [[Recoil]] -1<br/>[[Weapon accessories#Silencers|Silencers]] are rendered ineffective || [[Glock 18C]] || '''450''' || See [[Maze Customs:Major mods#Notes|note 1]]
|}
'''Barrel threading type'''
{| class="wikitable sortable" style="font-size:9pt"
|-
! Configuration name !! Effects !! Corresponding base models !! Cost ([[File:Parallar symbol.png|10px]]) !! Description
|-
| '''No threading''' || Muzzle: None || [[Glock 17]]<br/>[[Glock 18C]]<br/>[[Glock 22]]<br/>[[Glock 31]] || '''50''' || Original barrel profile with no threading.
|-
| '''Standard threading''' || Muzzle: Standard devices || || '''150''' || Modern muzzle threading system for mounting Standard muzzle devices.
|}
| '''Ported barrel''' || [[Recoil]] -1<br/>[[Weapon accessories#Silencers|Silencers]] are rendered ineffective || || '''450''' || See [[Maze Customs:Major mods#Notes|note 1]]
|}
'''Barrel threading type'''
{| class="wikitable sortable" style="font-size:9pt"
|-
! Configuration name !! Effects !! Corresponding base models !! Cost ([[File:Parallar symbol.png|10px]]) !! Description
|-
| '''No threading''' || Muzzle: None || [[Glock 20]]<br/>[[Glock 21]] || '''50''' || Original barrel profile with no threading.
|-
| '''Standard threading''' || Muzzle: Standard devices || || '''150''' || Modern muzzle threading system for mounting Standard muzzle devices.
|}
=== Fire control (Glock-LF) ===
| '''Old style''' || Optics: N/A || [[Colt AR-15A2 R6550]]<br/>[[Colt M16A1]]<br/>[[Colt M16A2]]<br/>[[Colt XM177E2 Commando]] || '''200''' || Original style upper receiver with non-detachable carrying handle, and no mounting points for optics.
|-
| '''Flat top''' || Optics: NATO-S mount<br/>(or '''NATO mount''' if the '''Quad rails''' are also installed) || [[Alexander Arms AWS]]<br/>[[Colt M16A4]]<br/>[[Colt M4]]<br/>[[Colt M4A1]]<br/>[[Colt Mark 18 Mod 0]] || '''600''' || Modern upper receiver with a length of NATO-S rail for mounting optics. Comes with a detachable carrying handle with adjustable rear iron sights.<br/>If paired with the quad rails, the top rail section serves as an extension of your flat top, giving you a full-length NATO rail.
|-
| '''DMR''' || Optics: Integrated 3x scope<br/>Affects weapon category<sup>'''[[Maze Customs:Major mods#AR-15 weapon categorization|(*)]]''' || || '''600''' || Special upper receiver featuring a proprietary ART II 3x scope, in the style of the Colt Model 656.
|-
| '''XM3 barrel''' || 18.5 inches || Weight tier -1 || || '''600''' || Installs a special purpose 18.5 inch barrel, meant to reduce overall length and weight without sacrificing too much performance.
|}
'''Barrel threading type'''
{| class="wikitable sortable" style="font-size:9pt"
|-
! Configuration name !! Effects !! Corresponding base models !! Cost ([[File:Parallar symbol.png|10px]]) !! Description
|-
| '''No threading''' || Muzzle: None || [[Remington Model 700 XCR II]]<br/>[[Remington Model 700 ADL]]<br/>[[Remington Model 700 BDL]]<br/>[[Remington M24]] || '''100''' || Original barrel profile with no threading.
|-
| '''Standard threading''' || Muzzle: Standard devices || || '''200''' || Modern muzzle threading system for mounting Standard muzzle devices.
|}