• Shop by Brand
  • Blogs
Login

Country

Language

Signup for our newsletter

Describe what your customers will receive when subscribing to your newsletter.

Cart

Your cart is empty

Internal Parts & Performance Upgrades

Welcome to the Internal Parts & Performance Upgrades Collection at PTS Steel Shop. Engineered for shooters who demand precision, efficiency, and reliability from their GBB and AEG airsoft platforms. Explore precision Hop-Up chambers and buckings, high-compression air-seal components (nozzles, cylinder heads, pistons), upgrade springs, and crisp fire control assemblies (triggers, hammers, sears). Maximize your trajectory consistency, FPS output, and trigger response for peak competitive performance.

Sort by

26 products

Airsoft OnlyMec enhanced tappet plate spring fix for standard v2 and v3 gearboxes
MEC
Enhanced Tappet Plate Spring — PTS Official Endorsed Reliability Sale priceHK$40.00
Airsoft OnlySteel Disconnector for ASG / KJW Shadow 2 GBB
CL Project Design
Steel Disconnector for ASG / KJW Shadow 2 GBB Sale priceHK$190.00
AEG EPM Replacement Part - Follower & Spring Set
PTS Replacement Parts
AEG EPM Replacement Part - Follower & Spring Set Sale priceHK$80.00
KWA LM4 GBBR Bolt Carrier Set
PTS Syndicate
KWA LM4 GBBR Bolt Carrier Set Sale priceHK$720.00
Airsoft Only7075 Aircraft Aluminum CNC Competition Trigger for ASG / KJW CZ Shadow 2 GBB (Black / Silver)
CL Project Design
7075 Aircraft Aluminum CNC Competition Trigger for ASG / KJW CZ Shadow 2 GBB (Black / Silver) Sale priceHK$330.00
Color
Airsoft OnlyMEC, MEC Desire for Performance, Desire for Performance, MEC R-Type Piston Head For KWA TT-33 M9 M93R Umraex MP7 KWA, KWA, TT-33, M9, M93R, Umraex MP7, MP7
MEC
R-Type KWA-14 High-Intake Brass Piston Head (For KWA MP7 / M9 / M93R / TT-33) Sale priceHK$70.00
EPM1 Replacement Part - Follower & Spring Set
PTS Replacement Parts
EPM1 Replacement Part - Follower & Spring Set Sale priceHK$95.00
Airsoft OnlyMEC, MEC Desire for Performance, Desire for Performance, MEC R-Type Piston Head For TM PX4 FN 5-7 G17 Gen4 G19 WE17, TM PX4, FN 5-7, G17, Gen4, G19, WE17
MEC
R-Type Marui-15 High-Intake Brass Piston Head (for TM G17 Gen.4 / G19 / PX4 / FN 5-7) Sale priceHK$70.00
Airsoft OnlySold outMEC, MEC Desire for Performance, Desire for Performance, MEC R-Type Piston Head For TM Hi-Cap G17 Gen3 1911 KJ KP-17, TM Hi-Cap, G17, Gen3, 1911, KJ KP-17, KP-17
MEC
R-Type Marui-14 High-Intake Brass Piston Head (for TM Hi-Capa / P226 / G17 Gen.3 / 1911) Sale priceHK$70.00
OZ9 Blowback Nozzle Set – B1 to B5, B7 & B9 Replacement Kit
PTS Replacement Parts - OZ9 Series
OZ9 Blowback Nozzle Set – B1 to B5, B7 & B9 Replacement Kit Sale priceHK$180.00
EPM1-S Replacement Part - Follower & Spring Set
PTS Replacement Parts
EPM1-S Replacement Part - Follower & Spring Set Sale priceHK$80.00
Airsoft OnlyV Piston Head Set for GBB Airsoft Pistols (6-Pack)
MEC
V Piston Head Set for GBB Airsoft Pistols (6-Pack) Sale priceHK$160.00
Airsoft OnlyCZ TS2 & Orange Style Steel Hammer Set for ASG / KJW Shadow 2 & SP-01 (Black / Silver)
CL Project Design
CZ TS2 & Orange Style Steel Hammer Set for ASG / KJW Shadow 2 & SP-01 (Black / Silver) Sale priceHK$450.00
Color
Systema EPM Replacement Part - Lip Stopper w/ Spring
PTS Replacement Parts
Systema EPM Replacement Part - Lip Stopper w/ Spring Sale priceHK$40.00
Airsoft Only7075 Aircraft Aluminum CNC Magazine Button for ASG / KJW CZ Shadow 2 GBB (Black / Silver)
CL Project Design
7075 Aircraft Aluminum CNC Magazine Button for ASG / KJW CZ Shadow 2 GBB (Black / Silver) Sale priceHK$205.00
Color
Airsoft OnlyASG Factory OEM Shadow 2 Steel Hammer – Part Number 8
CL Project Design
ASG Factory OEM Shadow 2 Steel Hammer – Part Number 8 Sale priceHK$205.00
Airsoft OnlyASG Licensed Dan Wesson 715 CO2 Revolver Adjustable Trigger (Black / Silver)
CL Project Design
ASG Licensed Dan Wesson 715 CO2 Revolver Adjustable Trigger (Black / Silver) Sale priceHK$635.00
Color
370mm GBB 6.02mm Inner Barrel
Maple Leaf
370mm GBB 6.02mm Inner Barrel Sale priceHK$300.00
Airsoft OnlyMEC, MEC Desire for Performance, Desire for Performance, MEC R-Type Piston Head For KWA MK23 Mark 4 VZ61 Umarex HK35 KWA, Piston Head, KWA MK23, Mark 4, VZ61, Umarex HK35, KWA
MEC
R-Type KWA-15 High-Intake Brass Piston Head (For KWA HK45 / MK23 / MP9 / Mark 4 / VZ61) Sale priceHK$70.00
Airsoft OnlyAdapter Ring for Tokyo Marui M4 MWS GBB
PTS Syndicate
Adapter Ring for Tokyo Marui M4 MWS GBB Sale priceHK$75.00
Airsoft OnlyMAX Blowback Housing & Loading Nozzle Set: Elevating the OZ9 Performance Standard
MEC
MAX Blowback Housing & Loading Nozzle Set: Elevating the OZ9 Performance Standard Sale priceHK$560.00
TM Next Gen Recoil Shock M4/SCAR Replacement Parts - Follower & Spring Set
PTS Replacement Parts
TM Next Gen Recoil Shock M4/SCAR Replacement Parts - Follower & Spring Set Sale priceHK$60.00
Airsoft OnlyShadow 2 Competition Upgrade Kit (Magic Recoil Spring & CL Hand-Polished OEM Mag Lip)
CL Project Design
Shadow 2 Competition Upgrade Kit (Magic Recoil Spring & CL Hand-Polished OEM Mag Lip) Sale priceHK$175.00
Sold outJA Precision Tensioner for PTS Masada: Overriding Legacy Trajectory Liabilities with Symmetrical Mechanical Hop-Up Centering
Jones Airsoft
JA Precision Tensioner for PTS Masada: Overriding Legacy Trajectory Liabilities with Symmetrical Mechanical Hop-Up Centering Sale priceHK$60.00
PMAG AEG Magazine Spring Replacement Set (F12, F13, F14)
PTS Replacement Parts
PMAG AEG Magazine Spring Replacement Set (F12, F13, F14) Sale priceHK$65.00
Airsoft OnlyEnhanced Gearbox For Systema PTW - Red
PTS Syndicate
Enhanced Gearbox For Systema PTW - Red Sale priceHK$1,110.00