For anyone who want compatibility with Sykriss
Vanilla Firearms Extended Patch A19, just copy this into items.xml
<set xpath="//item[@name='gun1911']/property[@name='RepairTools']/@value">gunHandgunT1PistolParts</set>
<set xpath="//item[@name='gun1911']/effect_group[@name='gunPistol']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gun45revolver']/property[@name='RepairTools']/@value">gunHandgunT1PistolParts</set>
<set xpath="//item[@name='gun45revolver']/effect_group[@name='gun44Magnum']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gun556rifle']/property[@name='RepairTools']/@value">gunRifleT1HuntingRifleParts</set>
<set xpath="//item[@name='gun556rifle']/effect_group[@name='gunHuntingRifle']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gun9mmrevolver']/property[@name='RepairTools']/@value">gunHandgunT1PistolParts</set>
<set xpath="//item[@name='gun9mmrevolver']/effect_group[@name='gun44Magnum']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gun9mmrifle']/property[@name='RepairTools']/@value">gunRifleT1HuntingRifleParts</set>
<set xpath="//item[@name='gun9mmrifle']/effect_group[@name='gunHuntingRifle']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunGlock17']/property[@name='RepairTools']/@value">gunHandgunT1PistolParts</set>
<set xpath="//item[@name='gunGlock17']/effect_group[@name='gunPistol']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunak101']/property[@name='RepairTools']/@value">gunMGT1AK47Parts</set>
<set xpath="//item[@name='gunak101']/effect_group[@name='gunAK47']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunaks74u']/property[@name='RepairTools']/@value">gunMGT1AK47Parts</set>
<set xpath="//item[@name='gunaks74u']/effect_group[@name='gunAK47']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunar15']/property[@name='RepairTools']/@value">gunRifleT1HuntingRifleParts</set>
<set xpath="//item[@name='gunar15']/effect_group[@name='gunAK47']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gundeserteagle']/property[@name='RepairTools']/@value">gunHandgunT1PistolParts</set>
<set xpath="//item[@name='gundeserteagle']/effect_group[@name='gunPistol']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gundoublebarrelproper']/property[@name='RepairTools']/@value">gunShotgunT1DoubleBarrelParts</set>
<set xpath="//item[@name='gundoublebarrelproper']/effect_group[@name='gunDoubleBarrelShotgun']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gung36c']/property[@name='RepairTools']/@value">gunRifleT1HuntingRifleParts</set>
<set xpath="//item[@name='gung36c']/effect_group[@name='gunAK47']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunhk416']/property[@name='RepairTools']/@value">gunRifleT1HuntingRifleParts</set>
<set xpath="//item[@name='gunhk416']/effect_group[@name='gunAK47']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunm1pcarbine']/property[@name='RepairTools']/@value">gunHandgunT1PistolParts</set>
<set xpath="//item[@name='gunm1pcarbine']/effect_group[@name='gunAK47']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunmac11']/property[@name='RepairTools']/@value">gunHandgunT1PistolParts</set>
<set xpath="//item[@name='gunmac11']/effect_group[@name='gunPistol']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunmakarov']/property[@name='RepairTools']/@value">gunHandgunT1PistolParts</set>
<set xpath="//item[@name='gunmakarov']/effect_group[@name='gunPistol']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunmicrouzi']/property[@name='RepairTools']/@value">gunHandgunT1PistolParts</set>
<set xpath="//item[@name='gunmicrouzi']/effect_group[@name='gunPistol']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunmk23']/property[@name='RepairTools']/@value">gunHandgunT1PistolParts</set>
<set xpath="//item[@name='gunmk23']/effect_group[@name='gunPistol']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunp250']/property[@name='RepairTools']/@value">gunHandgunT1PistolParts</set>
<set xpath="//item[@name='gunp250']/effect_group[@name='gunPistol']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunp99']/property[@name='RepairTools']/@value">gunHandgunT1PistolParts</set>
<set xpath="//item[@name='gunp99']/effect_group[@name='gunPistol']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunpp19']/property[@name='RepairTools']/@value">gunMGT1AK47Parts</set>
<set xpath="//item[@name='gunpp19']/effect_group[@name='gunSMG5']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunrsx1']/property[@name='RepairTools']/@value">gunShotgunT1DoubleBarrelParts</set>
<set xpath="//item[@name='gunrsx1']/effect_group[@name='gunPumpShotgun']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunscarh']/property[@name='RepairTools']/@value">gunMGT1AK47Parts</set>
<set xpath="//item[@name='gunscarh']/effect_group[@name='gunAK47']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunscarl']/property[@name='RepairTools']/@value">gunRifleT1HuntingRifleParts</set>
<set xpath="//item[@name='gunscarl']/effect_group[@name='gunAK47']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunsg553']/property[@name='RepairTools']/@value">gunRifleT1HuntingRifleParts</set>
<set xpath="//item[@name='gunsg553']/effect_group[@name='gunAK47']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunsinglebarrelshotgun']/property[@name='RepairTools']/@value">gunShotgunT1DoubleBarrelParts</set>
<set xpath="//item[@name='gunsinglebarrelshotgun']/effect_group[@name='gunDoubleBarrelShotgun']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunskorpion']/property[@name='RepairTools']/@value">gunHandgunT1PistolParts</set>
<set xpath="//item[@name='gunskorpion']/effect_group[@name='gunPistol']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunsks']/property[@name='RepairTools']/@value">gunMGT1AK47Parts</set>
<set xpath="//item[@name='gunsks']/effect_group[@name='gunAK47']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunsvd']/property[@name='RepairTools']/@value">gunRifleT1HuntingRifleParts</set>
<set xpath="//item[@name='gunsvd']/effect_group[@name='gunAK47']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='guntec9']/property[@name='RepairTools']/@value">gunHandgunT1PistolParts</set>
<set xpath="//item[@name='guntec9']/effect_group[@name='gunPistol']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='guntoz34']/property[@name='RepairTools']/@value">gunShotgunT1DoubleBarrelParts</set>
<set xpath="//item[@name='guntoz34']/effect_group[@name='gunDoubleBarrelShotgun']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunump45']/property[@name='RepairTools']/@value">gunHandgunT1PistolParts</set>
<set xpath="//item[@name='gunump45']/effect_group[@name='gunSMG5']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
<set xpath="//item[@name='gunusp']/property[@name='RepairTools']/@value">gunHandgunT1PistolParts</set>
<set xpath="//item[@name='gunusp']/effect_group[@name='gunPistol']/passive_effect[@name='DegradationPerUse'][@operation='base_set']/@value">0.4</set>
sorry, but somewhere I put the wrong part for one of items